CONCEPTS: park, skate, skateboarder

GEN: A group of skateboarders are skating at the park.

CONCEPTS: contain, kind, vegetable

GEN: The dish in the pot contains several different kinds of vegetables.

CONCEPTS: coast, horizon, reef

GEN: boat anchored near a shallow coral reef with coast at the horizon

CONCEPTS: cave, diver, explore

GEN:
divers exploring an underwater cave .