question: railway:road
choices.label: A B C D
choices.text: China:Taiwan air conditioners:household appliances uk:western europe usa:country
explanation: "railway" belongs to "road". "Taiwan" is part of "China". "household appliances" include "air conditioners". "uk" is part of "western europe". "usa" ​​is a "country", but it ​​is not a specific thing.
relation: road railway R2.2
relation: China Taiwan R2.3
relation: household appliances air conditioners R2.2
relation: uk western europe R2.3
relation: country usa R2.2