text: This is a well-written paper with sound experiments.  However, the research outcome is not very surprising.  - Only macro-average F-scores are reported.  Please present micro-average scores as well. - The detailed procedure of relation extraction should be described.  How do you use entity type information?  (Probably, you did not use entity types.) - Table 3: The SotA score of EU-ATR target-disease (i.e. 84.6) should be in bold face. - Section 5.3: Your system scorers in Table 3 are not consistent with Table 2 scores.  - Page 8. "Our approach outperforms ..."  The improvement is clear only for SNPPhenA and EU-ADR durg-disease. Minor comments: - TreeLSTM --> Tree-LSTM - Page 7. connexion --> connection - Page 8. four EU-ADR subtasks --> three ...  - I suggest to conduct transfer learning studies in the similar settings.