nese/posguide.3rd.ch.pdf In this paper, we employ the commonly used label set {B, I, E, S} for the segmentation part of cross-labels and the label of character can be in the form of {B-T}(T represents POS tag).
each mapping relation t 1 ↔ t 2 can be automatically transformed to four forms: Bt 1 ↔B-t 2 , I-t 1 ↔I-t 2 , E-t 1 ↔E-t 2 and S-t 1 ↔St 2 .