rtokens: Clinton said Iraqi military forces overran the city of Arbil , which has been held since 1994 by Kurdish rebels who Baghdad says are backed by Iran .
pos: DT NNP NN NNS VBD JJ NNS TO VB JJ NNS IN DT JJ CC JJ NNP VBD IN DT NN .
tokens: The U.S. defense officials said military flights to enforce no-fly zones in both northern and southern Iraq doubled over the weekend .
ltokens: But he added , " It is premature at this time , and I want to emphasize that , highly premature to speculate on any response we might have . "