Task: Question Understanding
Input (English): In this paper, we propose the first large-scale dataset for QA over social media data.   Table TABREF3 gives an example from our TweetQA dataset. The dataset now includes 10,898 articles, 17,794 tweets, and 13,757 crowdsourced question-answer pairs 
 Question: What is the size of this dataset?
Output (English): Extractive