CONCEPTS: fish, kayak, reel

GEN: A man fishing from a kayak is reeling in a fish.

CONCEPTS: continue, crowd, fight

GEN: Someone and someone continue to fight their way through the crowd which slowly funnels up another staircase.

CONCEPTS: fill, room, smoke

GEN: Smoke fills an empty dark room.

CONCEPTS: ecosystem, energy, organism, provide

GEN:
which organisms provide the least energy to an ecosystem