OPEC members are already pumping at full capacity and can do nothing about prices , '' Bijan Zanganeh , the oil minister of Iran , OPEC 's second-largest producer behind Saudi Arabia , said in Tehran before traveling to Vienna .
Iran /location/country/capital Tehran
Iran /location/location/contains Tehran
NNP NNS VBP RB VBG IN JJ NN CC MD VB NN IN NNS , '' NNP NNP , DT NN NN IN NNP , NNP POS JJ NN IN NNP NNP , VBD IN NNP IN VBG TO NNP .