CONCEPTS: building, clock, point

GEN: Very large building with a giant clock at the highest point.

CONCEPTS: cloud, fly, rocket

GEN: rocket is flying in the clouds .

CONCEPTS: build, carry, commander, sleigh, tunnel

GEN: a sleigh carrying the mail through a tunnel built by military commander

CONCEPTS: chair, library, table

GEN:
Three chairs are arrayed around a table in a library.