Biomedical named entity recognition with the combined feature attention and fully-shared multi-task learning

BMC Bioinformatics

Table 1 The statistics of the datasets used in our experiments

Dataset	Number of sentences	Sentence length	Entity type	Entity count
BC2GM	20,000	28.5	Gene/protein	24,583
JNLPBA	24,806	29.7		35,336
BC5CDR-disease	13,938	26.0	Disease	12,852
NCBI-disease	6881	26.1		6881
Linnaeus	23,155	23.1	Species	4263
Species-800	8130	25.9		3651
BC5CDR-chemical	13,938	26.0	Chemical	15,935

ISSN: 1471-2105