question: rhine:europe
choices.label: A B C D
choices.text: danube:north america africa:the nile the amazon:south america asia:the yellow river
explanation: the "rhine" is the river of "europe". the "danube" is a river in europe, not in "north america". the "nile" is a river in "africa". "the amazon" is a river in "south america".  "the yellow river" is a river in "asia", but "asia" is not a river of "the yellow river".
relation: rhine europe R3.6
relation: the nile africa R3.6
relation: the amazon south america R3.6
relation: the yellow river asia R3.6