pos: DT NN VBD TO DT NN IN NNP VBZ IN NNP .
tokens: That refusal led to the imposition of U.N. sanctions on Libya .
ltokens: The Treasury Department said Libya was on the U.S. list of states that sponsor international terrorism and noted that Tripoli has refused to hand over two Libyan suspects in the 1988 bombing of Pan Am flight 103 over Lockerbie , Scotland .