M. Stoeckel, W. Hemati, and A. Mehler. When Specialization Helps: Using Pooled Contextualized Embeddings to Detect Chemical and Biomedical Entities in Spanish. Proceedings of the International Workshop on BioNLP Open Shared Tasks (BioNLP-OST) 2019, Association for Computational Linguistics SIGDAT and Asian Federation of Natural Language Processing, 2019.