IVAS 2022 banner
IVES 9 IVES Conference Series 9 IVAS 9 IVAS 2022 9 Text mining of wine reviews to investigate quality markers of ‘Nebbiolo’ wines from Valtellina

Text mining of wine reviews to investigate quality markers of ‘Nebbiolo’ wines from Valtellina


In Valtellina zone (north Italy), the winemaking of ‘Nebbiolo’ grapes leads to the production of two main wine types: classic red wines from fresh grapes, usually classified as Valtellina Superiore DOCG (mandatory oak aging) or Rosso di Valtellina DOC, and the Sforzato di Valtellina DOCG, which is produced using withered grapes according to traditional product specification and subjected to mandatory oak aging process. The withering process influences grape chemical composition and, in turn, the wine sensory profile, which is strongly linked to the wine quality and typicity perceived by consumers.In this study, text mining operations on reviews from renowned wine magazines and web sources (The Wine Advocate, Wine Spectator, James Suckling Wine Ratings, Wine Enthusiast) were used to explore the differences between wines produced using fresh (Valtellina Superiore-Rosso di Valtellina) and withered (Sforzato) ‘Nebbiolo’ grapes with the aim of characterising the sensory markers of these two peculiar products.Firstly, the similarities and differences of terms deriving from the reviews of Sforzato (132 reviews obtained) and the group Valtellina Superiore-Rosso di Valtellina (368 reviews obtained) were investigated through keyness analysis using the AntConc software, to identify the relevant keywords that can distinguish these wines. Then, the determination of sensory descriptors associated to the ratings of the reviews was performed using text mining strategies through IRaMuTeQ software. Sforzato and Valtellina Superiore-Rosso di Valtellina corpora, separately, were divided in low (≤86), medium-low (87-89), medium-high (90-92), and high (≥93) ratings and evaluated by clustering and correspondence analysis (CA), to find out the sensory attributes that can explain and are correlated to the quality and typicity of each category of Valtellina wines.The keyness analysis showed a very similar corpus between the two wine categories, given by the common variety and origin. Nevertheless, significantly different lemmas were found, with Sforzato described as more ‘rich’, with higher frequencies of ‘prune’ and ‘chocolate’ aromas, ‘robust’ and ‘full bodied’ on the palate, and with ‘velvet-like’ texture mouthfeel when compared to ‘Nebbiolo’ produced from fresh grapes. ‘Velvety’ descriptor was as well linked to high quality in Sforzato, because in CA it was correlated with the high-ratings group, as well as the ‘prune’ aroma descriptors. ‘Rich’ was specific for medium-high rating group, and ‘full’ and ‘chocolate’ for medium-low. Generally, in-mouth descriptors, such as mouthfeel and astringency, were able to discriminate the Sforzato wines according to the ranking group.This data analysis approach can be helpful in identifying key sensory descriptors for specific wine types and unravel markers of wine typicality. Furthermore, this knowledge will allow wine producers to modulate the winemaking strategies to obtain products noticeable by consumers.


Publication date: June 27, 2022

Issue: IVAS 2022

Type: Poster


Paissoni Maria Alessandra1, LEE Lei1, Río Segade Susana1, Giacosa Simone1, Gerbi Vincenzo1 and Rolle Luca1

1Department of Agricultural, Forest and Food Sciences (DISAFA), University of Torino

Contact the author


Text mining, Keyness analysis, Wine quality, Sensory descriptors, Wine reviews


IVAS 2022 | IVES Conference Series


Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.