Here are some concepts: country, night, red, space

What is a sentence about these concepts?

Sentence is below.
night above country highlighted in red on model in space .

Here are some concepts: police, protester, spray, use

What is a sentence about these concepts?

Sentence is below.
police use pepper spray on the mob of protesters .

Here are some concepts: flower, pattern, square

What is a sentence about these concepts?

Sentence is below.
this floral pattern of blue flowers in the form of squares

Here are some concepts: operate, track, train

What is a sentence about these concepts?
Sentence is below.
Maneuvering trains operated by steam on several tracks.