question:  Who is the man climbing the mountain?
context: Illustrated by Schoenherr The wind howled out of the northwest, blind with snow and barbed with ice crystals. All the way up the half-mile precipice it fingered and wrenched away at groaning ice-slabs. 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. 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'. Took his finger off the button and there we were: Alpha Centauri . Matt Hennessy, from Farside Observatory, back of the Moon, just back from a proving flight cum astronomical survey in the starship Whale . 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. When I say they, I mean a ten-man team of them. 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. 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:  An astronomical surveyor who ended up there by accident
options:  A mountain guide looking for survivors  An astronomical surveyor who ended up there by accident  A mountaineer who happened to stumble upon an old radio  A Chang native looking for people on this planet