The proposal as described appears to refer to Iran 's work at Natanz , where it is building a prototype plant that would hold 1,000 centrifuges and an industrial-scale one that would hold 50,000 machines .
Iran /location/location/contains Natanz
DT NN IN VBN VBZ TO VB TO NNP POS NN IN NNP , WRB PRP VBZ VBG DT NN NN WDT MD VB CD NNS CC DT JJ CD WDT MD VB CD NNS .
Iran
LOCATION
Natanz
LOCATION
/location/location/contains