The full dataset comprises both the sample mentioned above and the 819 pairs from our preliminary work, totalling 2677 pairs. We split the vSTS dataset into training, validation and test partitions sampling at random and preserving the overall score distributions. In total, we use 1338 pairs for training, 669 for validation, and the rest of the 670 pairs were used for the final testing. 
 Question: How big is vSTS training data?
1338 pairs for training