Task: Question Answering
Input (English): Building Extractive CNN/Daily Mail 
 Question: What is the problem with existing metrics that they are trying to address?
Output (English): Answer with content missing: (whole introduction) However, recent
studies observe the limits of ROUGE and find in
some cases, it fails to reach consensus with human.
judgment (Paulus et al., 2017; Schluter, 2017).