Diplomats familiar with what Iran has told atomic inspectors in recent days said the country had started work on second and third '' cascades '' of 164 centrifuges , preparing to match the first already in operation at its enrichment facility in Natanz .
Iran /location/location/contains Natanz
NNS JJ IN WP NNP VBZ VBN JJ NNS IN JJ NNS VBD DT NN VBD VBN NN IN JJ CC JJ '' NNS '' IN CD NNS , VBG TO VB DT JJ RB IN NN IN PRP$ NN NN IN NNP .
Iran
LOCATION
Natanz
LOCATION
/location/location/contains