@Book{IEKA:2011,
  editor    = {Preslav Nakov and  Zornitsa Kozareva and  Kuzman Ganchev and  Jerry Hobbs},
  title     = {Proceedings of the RANLP 2011 Workshop on Information Extraction and Knowledge Acquisition},
  month     = {September},
  year      = {2011},
  address   = {Hissar, Bulgaria},
  url       = {http://aclweb.org/anthology/W11-40}
  series	= {IEKA'11}
}