  This paper presents the ReCO, a human-curated ChineseReading Comprehension
dataset on Opinion. The questions in ReCO are opinion based queries issued to
the commercial search engine. The passages are provided by the crowdworkers who
extract the support snippet from the retrieved documents. Finally, an
abstractive yes/no/uncertain answer was given by the crowdworkers. The release
of ReCO consists of 300k questions that to our knowledge is the largest in
Chinese reading comprehension. A prominent characteristic of ReCO is that in
addition to the original context paragraph, we also provided the support
evidence that could be directly used to answer the question. Quality analysis
demonstrates the challenge of ReCO that requires various types of reasoning
skills, such as causal inference, logical reasoning, etc. Current QA models
that perform very well on many question answering problems, such as BERT, only
achieve 77% accuracy on this dataset, a large margin behind humans nearly 92%
performance, indicating ReCO presents a good challenge for machine reading
comprehension. The codes, datasets are freely available at
https://github.com/benywon/ReCO.
