The leader of Iran 's negotiating team was said to be returning to Tehran .
Iran /location/country/capital Tehran
Iran /location/location/contains Tehran
DT NN IN NNP POS VBG NN VBD VBN TO VB VBG TO NNP .
Iran
LOCATION
Tehran
LOCATION
/location/country/capital
Iran
LOCATION
Tehran
LOCATION
/location/location/contains