question: eyes:glasses:contact lenses
choices.label: A B C D
choices.text: palm:gloves:cotton gloves headphones:ears:bluetooth headphones ankle:knee pad:sports knee pad dentures:braces:porcelain braces
explanation: "eyes" may wear "glasses", and "glasses" includes "contact lenses". "palm" can wear "gloves", and "gloves" include "cotton gloves". "ears" can wear "headphones". "headset" includes "bluetooth headset". the word order is inconsistent with the title stem. the "knee pad" is placed on the knee, not on the "ankle". "knee pads" and "ankles" do not have some kind of connection. "sports knee pad" is a kind of "knee pad". Besides "sports knee pad", there are other knee protection. "braces" are not worn on "dentures". "braces" and "dentures" do not have a certain connection. "porcelain braces" is a kind of "braces". besides "porcelain braces", there are other braces.
relation: glasses eyes R2.2
relation: gloves palm R2.2
relation: headphones ears R2.2
relation: knee pad ankle R2.2