question: euro:dollar
choices.label: A B C D
choices.text: kilogram:kilometer fiction:prose kilometers:hour negative:positive
explanation: "euro" and "dollar" are both monetary units, "euro" and "dollar" are a class, but in addition to "euro" and "dollar", there are also japanese yen and so on. "kilogram" and "kilometer" are different in measurement content. "kilogram" is the unit of weight, and "km" is the unit of distance. "fiction" and "prose" are both styles, "novel" and "prose" are a category, but in addition to "novel" and "prose", there is also poetry and so on. "kilometers" and "hours" measure different content, "km" is the unit of distance, and "hour" is the unit of time. "negative" and "positive" contradict each other.
relation: euro dollar R2.6
relation: fiction prose R2.6
relation: negative positive R2.5