CONCEPTS: bear, lie, rock

GEN: A polar bear with his chin raised lies on a rock.

CONCEPTS: book, hourglass, table

GEN: scientific books on the table with hourglass

CONCEPTS: home, sign, visitor, welcome

GEN: the sign welcomed visitors to the new home .

CONCEPTS: crop, field, grow, row

GEN:
a green row of fresh crops grow on an agricultural farm field