Task: Question Answering
Input (English): We introduce a new model for difficulty prediction combining learned representations induced via a pre-trained `universal' sentence encoder BIBREF6 , and a sentence encoder learned from scratch for this task. In total, this resulted in 57,505 and 2,428 sentences in the train and test set abstracts, respectively. 
 Question: How much data is needed to train the task-specific encoder?
Output (English): 57,505 sentences