rtokens: However , it called the conditions " more severe " than those imposed by other regulatory authorities on similar airline alliances .
pos: NNP POS NN , NNP NNP , VBD PRP VBD RB VB DT NNS IN DT " NN NN . "
tokens: American 's parent , AMR Corp. , said it did not view the terms as a " deal breaker . "
ltokens: The conditions for clearance of the alliance were that British Airways and American drop 168 slots at London Heathrow airport , the busiest in Europe .