question: U.K.:United Kingdom
choices.label: A B C D
choices.text: U.S.: Canada rhododendron:azalea river:lake tomatoes:cherry tomatoes
explanation: the abbreviation of "United Kingdom" is "U.K.". the abbreviation of "Canada" is not "U.S.", but the abbreviation of United States is "U.S.". "rhododendron" is also known as "azalea". "river" and "lake" are two different water bodies, besides "river" and "lake", there are other water bodies. "cherry tomatoes" refers to small tomatoes. "cherry tomato" is a kind of "tomato", and the alias of "tomato" is not "cherry tomato".
relation: U.K. United Kingdom R2.1
relation: azalea rhododendron R2.1
relation: river lake R2.4
relation: cherry tomatoes tomatoes R2.2