Task: Question Answering
Input (English): We also conduct two human evaluations in order to assess (a) which type of summary participants prefer (we compare extractive and abstractive systems) and (b) how much key information from the document is preserved in the summary (we ask participants to answer questions pertaining to the content in the document by reading system summaries). 
 Question: Do they use other evaluation metrics besides ROUGE?
Output (English): Yes