question: iron:copper:magnesium
choices.label: A B C D
choices.text: baseball:volleyball:billiards high heels:high-top:heightening shoes high-gluten flour:rice flour:flour lamb:beef:bacon
explanation: "iron", "copper" and "magnesium" are all metals, but in addition to "iron", "copper", and "magnesium", there are other metals. "baseball", "volleyball", and "billiards" are all ball sports, but in addition to "baseball", "volleyball", and "billiards", there are other ball sports. "high heels" can be "high-top" and "high-top" can also be "high heels". "flour" includes "high-gluten flour". the raw materials of "bacon" include "mutton" and "beef". "mutton", "beef", and "bacon" are not the same category.
relation: iron copper magnesium R2.6
relation: baseball volleyball billiards R2.6
relation: high heels high-top R2.7
relation: high-gluten flour flour R2.2
relation: lamb bacon R3.7
relation: beef bacon R3.7