1. Alicante, A., Corazza, A.: Barrier features for classification of semantic relations. In: Proceedings of the International Conference Recent Advances in Natural Language Processing 2011, pp. 509–514 (2011)
2. Bunescu, R., Mooney, R.: A shortest path dependency Kernel for relation extraction. In: Proceedings of Human Language Technology Conference and Conference on Empirical Methods in Natural Language Processing, pp. 724–731 (2005)
3. Devlin, J., Chang, M.W., Lee, K., Toutanova, K.: BERT: pre-training of deep bidirectional transformers for language understanding. arXiv preprint arXiv:1810.04805 (2018)
4. Han, X., et al.: More data, more relations, more context and more openness: a review and outlook for relation extraction. arXiv preprint arXiv:2004.03186 (2020)
5. Hochreiter, S., Schmidhuber, J.: Long short-term memory. Neural Comput. 9(8), 1735–1780 (1997)