@ARTICLE{SurdeanuMarCarCom2007,
  author = {Mihai Surdeanu and Llu{\'i}s M{\`a}rquez and Xavier Carreras and Pere Comas},
  title = {Combination Strategies for Semantic Role Labeling},
  journal = {JAIR},
  year = {2007},
  volume = {29},
  pages = {105--151}
}