question: day:night
choices.label: A B C D
choices.text: man:woman mountain:sea white:black elder:child
explanation: there are only "day" and "night" in a day, and "day" and "night" have opposite meanings. there are only "man" and "woman" when humans are divided by sex, "man" and "woman" mean the opposite. "mountain" and "sea" are of the same type, but in the world there are hills, lakes, etc. in addition to "mountains" and "seas". "mountains" and "seas" have different meanings. there are many kinds of colors, such as "white", "black", red, green, etc. "white" and "black" have opposite meanings. "elders" and "children" belong to human beings, and young people and middle-aged people also belong to human beings.
relation: day night R2.5
relation: man woman R2.5
relation: mountain sea R2.6
relation: white black R2.6
relation: elder child R2.6