Shi, Wuzhen
Liu, Shaohui https://orcid.org/0000-0002-1810-5412
Jiang, Feng
Zhao, Debin
Tian, Zhihong
Funding for this research was provided by:
the MOE–Microsoft Key Laboratory of Natural Language Processing and Speech
the Major State Basic Research Development Program of China (2015CB351804)
the National Natural Science Foundation of China (61572155, 61672188 and 61272386)
Article History
Received: 7 January 2018
Accepted: 20 April 2018
First Online: 24 May 2018
Competing interests
: The authors declare that they have no competing interests.
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