input question: Two neighboring habitable planets from the same solar system, planet U and planet N, had Earth-like atmospheres. The inhabitants of planet U destroyed the ozone layer by their actions, while their neighboring planet N didn't. Which planet released more bromine gas in their atmosphere????
output answer: planet U

input question: Two students learned about soils in school. Brad had to study forest soils, while his colleague Frank had to study grasslands. They both did a good job and received A's for their efforts and accumulated knowledge. Which student read more about a rich diversity of large trees????
output answer: Brad

input question: Two cities had different energy source. Big city burned fossil fuels, while Blue city used alternative sources of energy. Which city produced more carbon dioxide????
output answer: Big

input question: Two cousins lived 10,000 miles away from each other but often talked about visiting the Hawaiian islands together. Lilly lived in Maine, while Heather lived in Hawaii. Which cousin lived farther from the Big Island of Hawaii????
output answer:
Lilly