rtokens: Northern Iraq has been under Iraqi Kurdish control since after the 1991 Gulf War .
pos: DT NNP VBZ DT NNP IN VBG IN NNP .
tokens: The PUK accuses the KDP of collaborating with Baghdad .
ltokens: The KDP charges that the rival Patriotic Union of Kurdistan , which took control of Arbil in fighting in December 1994 , has backing from Iran .