Here are some concepts: dog, skier, slope

What is a sentence about these concepts?

Sentence is below.
A skier is traveling down a slope while a dog is behind.

Here are some concepts: hang, rack, tie

What is a sentence about these concepts?

Sentence is below.
A rack of bow ties hanging from clothes pins.

Here are some concepts: bark, cover, tree

What is a sentence about these concepts?

Sentence is below.
lichens almost completely cover the bark of a tree

Here are some concepts: cover, doughnut, ice

What is a sentence about these concepts?
Sentence is below.
A doughnut covered in icing and crumbled cookie pieces.