@Book{TAG+4:1998,
  editor    = {Abeill\'{e}, Anne and Becker, Tilman and Satta, Giorgio and Vijay-Shanker, K.},
  title     = {Proceedings of the Fourth International Workshop on Tree Adjoining Grammars and Related Frameworks (TAG+4)},
  month     = {August},
  year      = {1998},
  address   = {University of Pennsylvania},
  url       = {http://www.aclweb.org/anthology/W98-01}
}