question: house:foundation
choices.label: A B C D
choices.text: art:economics train:railway marriage:love trouble:desire
explanation: only when there is a "foundation" can there be a "house". both "art" and "economics" are a discipline, and there is no obvious logical relationship. only when there is a "railway" can there be a "train". without "love", there may also be "marriage" without "desire", there may also be "troubles"
relation: house foundation R5.4
relation: train railway R5.4