chinifabio / nlp-project-2023

Semantic Textual Similarity

NLP-Project-2023

STS: Semantic Textual Similarity

• Website with data: http://ixa2.si.ehu.eus/stswiki/index.php/STSbenchmark
• Dataset: The dataset consists of pairs of sentences that have been judged by humans on how similar they are to one another. Here the similarity indicates the level of (semantic) agreement between the meaning of the sentences. The sentences have been sourced from three domains (news, caption and forum).
• Task: the original task here is to predict the similarity between the sentences. Note that this problem could be handled as either a regression (predict a real score) or classification (predict similar/non-similar label) task.
• Hints and suggestions: You could investigate various unsupervised techniques, such as computing the cosine similarity between TF-IDF bag-of-words vectors for the sentences, extending the BOW vector to include n-grams (bigrams and trigrams), and also consider the distance between average word embeddings. Moreover, supervised models could be trained, in particular transformer-based models are often fine-tuned to classify pairs of sentences.