question: trace elements:rare metals:copper
choices.label: A B C D
choices.text: woody plants:herbs:pine sea animals:mammals:polar bears inland lake:freshwater lake:Caspian Sea arthropods:amphibians:crocodiles
explanation: "copper" belongs to "trace elements". "copper" does not belong to "rare metals". some "trace elements" are "rare metals", and some "rare metals" are "trace elements". "pine" belongs to "woody plants". "pine" does not belong to "herbs". "woody plants" and "herbs" are in the same category. "polar bears" do not belong to "sea animals". "polar bears" belong to "mammals", and the order of words is opposite to that of the query. "Caspian Sea" is a "inland lake". "Caspian Sea" is not a "freshwater lake". some "freshwater lakes" are "inland lakes", and some "inland lakes" are "freshwater lakes". a "crocodile" is not an "arthropod" nor an "amphibian". a "crocodile" is a reptile.
relation: copper trace elements R2.2
relation: trace elements rare metals R2.7
relation: pine woody plants R2.2
relation: woody plants herbs R2.4
relation: Caspian Sea inland lake R2.2
relation: inland lake freshwater lake R2.7