Before revision:  Results show that existing state-of-the-art language models such as BERT can achieve a high performancein both in-domain data and out-of-domain data, but they still have room for improvement .
After revision:  Results show that existing state-of-the-art language models. Experimental results show that even though these models can perform decently on the task, there remains a gap between machine and human performance, especially in out-of-domain data, but they still have room for improvement .