uhKD4 at eHealth-KD Challenge 2021: Deep Learning Approaches for Knowledge Discovery from Spanish Biomedical Documents. - Dayany Alfaro-González; Dalianys Pérez-Perera; Gilberto González-Rodríguez; Antonio Jesús Otaño-Barrera; Rocío Cruz Linares (IberLEF@SEPLN, 2021)