Under a system begun in the Soviet era , 80 percent of Russia 's exports to Europe have passed through Ukraine .
Europe /location/location/contains Russia
Europe /location/location/contains Ukraine
IN DT NN VBN IN DT JJ NN , CD NN IN NNP POS NNS TO NNP VBP VBN IN NNP .
Europe
LOCATION
Russia
LOCATION
/location/location/contains
Europe
LOCATION
Ukraine
LOCATION
/location/location/contains