question: data:document
choices.label: A B C D
choices.text: mass:weight airship:aircraft frigate:supply ship natural phenomenon:aurora
explanation: a "document" is a kind of "data" "weight" is a measuring tool to measure "mass", and "weight" is not a kind of "mass". "airship" is a kind of "aircraft", and "aircraft" is not a kind of "airship". both "frigates" and "supply ships" belong to ships, and "supply ships" are not a type of "frigates". "aurora" is a "natural phenomenon"
relation: data document R2.2
relation: mass weight R3.10
relation: airship aircraft R2.2
relation: frigate supply ship R2.4
relation: natural phenomenon aurora R2.2