As American oil companies are barred from investing in Iran because of unilateral sanctions , Iran 's policy is opening the door to their state-owned rivals in Asia to build up oil and gas reserves as a counterweight .
Asia /location/location/contains Iran
Asia /location/location/contains Iran
IN JJ NN NNS VBP VBN IN VBG IN NNP IN IN JJ NNS , NNP POS NN VBZ VBG DT NN TO PRP$ JJ NNS IN NNP TO VB RP NN CC NN NNS IN DT NN .
Asia
LOCATION
Iran
LOCATION
/location/location/contains
Asia
LOCATION
Iran
LOCATION
/location/location/contains