question: china:hangzhou
choices.label: A B C D
choices.text: united states:pittsburgh france:frankfurt united states:valencia uae:saudi
explanation: "hangzhou" is part of "china" "pittsburgh" is part of "america" "frankfurt" is not part of "france". "valencia" is not part of "america". "uae" and "saudi" are different countries.
relation: hangzhou china R2.3
relation: united states pittsburgh R2.3
relation: uae saudi R2.4