Here are some concepts: fireman, sit, station

What is a sentence about these concepts?

Sentence is below.
The firemen are sitting in their fire station.

Here are some concepts: association, organism, symbiosis

What is a sentence about these concepts?

Sentence is below.
symbiosis a relationship in which different organisms live in close association with each other

Here are some concepts: market, sale, sunflower

What is a sentence about these concepts?

Sentence is below.
cut sunflowers for sale in the flower market

Here are some concepts: classroom, pupil, school

What is a sentence about these concepts?
Sentence is below.
cute pupil using abacus in classroom at the elementary school