Table 5.

Standard deviation and root mean square error.

Research Team	Methods	SD	RMSE
Other Teams	Plain SVM [10]	0.018	0.017
	Hierarchical SVMs [10]	0.022	0.021
Our Works	BOW-BiGRU-Att	0.013	0.012
	Word2Vec-BiGRU-Att	0.014	0.013
	FastText-BiGRU-Att	0.023	0.021
	GloVe-BiGRU-Att	0.017	0.016
	ELMo-BiGRU-Att	0.016	0.015
	FT-GPT-FC	0.016	0.015
	FT-BERT-FC	0.015	0.014