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Fig. 3 | BMC Bioinformatics

Fig. 3

From: A neural joint model for entity and relation extraction from biomedical text

Fig. 3

The Bi-LSTM-RNN for relation classification. The input sentence is tokenized before it is analyzed by a dependency parser. Tokens are indexed by Arabic numerals. Basic (a.k.a, projective) dependency style is utilized to build a tree. The bold lines in the tree denote the shortest dependency path (SDP) between “gliclazide” and “hepatitis” with their lowest common ancestor “induced”. x i indicates the input vector of a LSTM unit as shown in Eq. 6 and i corresponds to the index of a token. In the Bi-LSTM-RNN layer, solid arrow lines denote bottom-up and top-down computations along the SDP in the dependency tree. h a , h b , h a , h b are listed in Eq. 8

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