ASSIN (Avaliação de Similaridade Semântica e INferência textual) is a dataset with semantic similarity score and entailment annotations. It was used in a shared task in the PROPOR 2016 conference.

The full dataset has 10,000 sentence pairs, half of which in Brazilian Portuguese and half in European Portuguese, and can be downloaded here. Either language variant has 2,500 pairs for training, 500 for validation and 2,000 for testing. This is different from the split used in the shared task, in which the training set had 3,000 pairs and there was no validation set. The shared task training set can be reconstructed by simply merging both sets.

You can also see the list of annotators who took part in the creation of the dataset.

Evaluation Script and Baselines

You can find the official ASSIN evaluation script and baseline implementations in the GitHub repository. They are written in Python and require NumPy, SciPy and sklearn. One of the baselines also requires NLTK.

The evaluation script evaluates accuracy and macro F1 (the mean of the F1 scores of all classes) for textual entailment recognition and Pearson correlation and mean squared error for semantic similarity. It can be run as follows:

python gold-file.xml system-file.xml

Or see its usage instructions with:

python -h

Published Results on ASSIN

This is a list of published results we are aware of on ASSIN, besides the results of the participants of the shared task.

Title Links
Avaliando a similaridade semântica entre frases curtas através de uma abordagem híbrida PDF
Análise de Medidas de Similaridade Semântica na Tarefa de Reconhecimento de Implicação Textual PDF
Statistical and Semantic Features to Measure Sentence Similarity in Portuguese