Table 3 Labels for the CRF model.
From: CHEMDNER system with mixed conditional random fields and multi-scale word clustering
No. | Label | Explanation |
|---|---|---|
1 | B | beginning of a normal sequence |
2 | M | middle of a normal sequence |
3 | E | end of a normal sequence |
4 | S | single-token normal sequence |
5 | B_NER, | beginning of a NER sequence |
6 | M_NER | middle of a NER sequence |
7 | E_NER, | end of a NER sequence |
8 | S_NER | single-token NER sequence |