question: popular:classic
choices.label: A B C D
choices.text: experts:scholars courage:quality roots:leaves leap month:spring
explanation: some "popular" things are "classic", and some "classic" things are "popular". some "experts" are "scholars", and some "scholars" are "experts". "quality" includes "courage". a tree consists of "roots" and "leaves". "leap month" refers specifically to the month added to the lunisolar calendar every leap year. the seasons include "spring", and there is no obvious logical relationship between "leap month" and "spring".
relation: popular classic R2.7
relation: experts scholars R2.7
relation: courage quality R2.2
relation: roots leaves R2.4