question: lines:geometry:euclid
choices.label: A B C D
choices.text: pencil:art:van gogh sky:philosophy:philosopher conclusion:syllogism:aristotle imaginary number:base number:chen jingrun
explanation: "line" is part of "geometry", the father of "geometry" is "euclid". the "art" utensil is the "pencil" and the "pencil" is not part of "art". there is no obvious logical relationship between "sky" and "philosophy". "conclusion" is part of "syllogism", the father of "syllogism" is "aristotle". mathematical terms include "imaginary numbers" and "base numbers", and "imaginary numbers" are not part of "base numbers".
relation: lines geometry R2.3
relation: pencil art R3.10
relation: conclusion syllogism R2.3
relation: imaginary number base number R2.4