question:  Why was Charley so interested in the Minnow?
context: Illustrated by Schoenherr The wind howled out of the northwest, blind with snow and barbed with ice crystals. The sun glinted on black rock glazed by ice, chasms and ridges and bridges of ice. It lit the snow slope to a frozen glare, penciled black shadow down the long furrow, and flashed at the furrow's end on a thing of metal and plastics, an artifact thrown down in the dead wilderness. Nothing grew, nothing flew, nothing walked, nothing talked. If I were ten years older, it would have been an honor, being picked for the first long jump in the first starship ever. We got lined up between Earth and Mars, you'll remember, and James pushed the button marked 'Jump'. There was never anything wrong with the Whale till right at the end and even then I doubt if it was the ship itself that fouled things up. Walking, talking natives on a blue sky planet with 1.1 g gravity and a twenty per cent oxygen atmosphere at fifteen p.s.i. The odds against finding Chang on a six-sun survey on the first star jump ever must be up in the googols. We were able to show them our sun, in their telescopes. "Two, they brew a near-beer that's a lot nearer than the canned stuff we had aboard the Whale . People who talk English, drink beer, like jokes and beat me at chess or table-tennis are people for my money, even if they look like tigers in trousers. It was more that we all seemed to make silly mistakes when we played them and that's fatal in chess. Of course it's a screwy situation, playing chess with something that grows its own fur coat, has yellow eyes an inch and a half long and long white whiskers. He was called—well, we called him Charley, and he was the ethnologist, ambassador, contact man, or whatever you like to call him, who came back with us.
output:  He wants to learn enough to pull an elaborate prank
options:  He has been sent to steal the technological secrets  His species does not have space travel and he wants to learn from the humans  They do not have similar wildlife on his planet  He wants to learn enough to pull an elaborate prank