Here are some concepts: side, stop, train

What is a sentence about these concepts?

Sentence is below.
Two red trains stopped side by side on the tracks,

Here are some concepts: bike, lot, park

What is a sentence about these concepts?

Sentence is below.
many bikes parked in a parking lot very close to each other

Here are some concepts: flower, garden, pumpkin

What is a sentence about these concepts?

Sentence is below.
big ripe pumpkin lying on the ground in garden among the flowers

Here are some concepts: bridge, build, city

What is a sentence about these concepts?
Sentence is below.
a makeshift shelter built by a homeless man under one of the bridges in the centre of city