A portable method for acquiring information extraction patterns without annotated corpora

@article{Catal2003APM,
  title={A portable method for acquiring information extraction patterns without annotated corpora},
  author={Neus Catal{\`a} and N{\'u}ria Castell and Mario Mart{\'i}n},
  journal={Natural Language Engineering},
  year={2003},
  volume={9},
  pages={151-179}
}