The Second Tagging Layer: TLSTM2 Though the TLSTM1 can capture the interdependency between current event candidate and the former predicted event tags, it can not capture the interdependency between the current event candidate and the later predicted event tags.
we devise a second tagging layer (TLSTM2) upon the LSTM1 to capture the interdependency between the current event candidate and both of former and later predicted event tags from TLSTM1.