Overview of CLEF eHealth Task 1 - SpRadIE: A challenge on information extraction from Spanish Radiology Reports. - Viviana Cotik; Laura Alonso Alemany; Darío Filippo; Franco Luque; Roland Roller; Jorge Vivaldi; Ammer Ayach; Fernando Carranza; Lucas Defrancesca; Antonella Dellanzo; Macarena Fernández Urquiza (CLEF (Working Notes), 2021)