CONCEPTS: cloud, sky, storm

GEN: dark clouds in the winter sky during a storm at sea

CONCEPTS: coffee, cup, foam, heart

GEN: cup of coffee with heart on foam and some ingredients

CONCEPTS: fence, grass, graze, zebra

GEN: Two zebras are grazing in the grass near a fence.

CONCEPTS: gather, library, table

GEN:
students gather around tables to study in the library