Tom O'Rourke , director of the Health Department in Black Hawk County , Iowa , said that preliminary tests showed the cause to be E. coli , but there was no evidence to suggest that the contamination is linked to the cases in New York , New Jersey and four other states .
Iowa /location/location/contains Black Hawk County
NNP NNP , NN IN DT NNP NNP IN NNP NNP NNP , NNP , VBD IN JJ NNS VBD DT NN TO VB FW FW , CC EX VBD DT NN TO VB IN DT NN VBZ VBN TO DT NNS IN NNP NNP , NNP NNP CC CD JJ NNS .
Iowa
LOCATION
Black Hawk County
LOCATION
/location/location/contains