FreeLing: open-source natural language processing for research and development Lluís Padró author 2011-jan 20-21 text Proceedings of the Second International Workshop on Free/Open-Source Rule-Based Machine Translation Felipe Sánchez-Martinez editor Juan Antonio Pérez-Ortiz editor Barcelona, Spain conference publication padro-2011-freeling https://aclanthology.org/2011.freeopmt-1.2/ 2011-jan 20-21 2