Produce a sentence which mentions all of these concepts: chair, occupant, protect, umbrella

the umbrella is not optimally placed to protect the occupants of the chairs

Produce a sentence which mentions all of these concepts: bicycle, load, push, vegetable

A man in a blue jacket is pushing a bicycle loaded with a potato type vegetables.

Produce a sentence which mentions all of these concepts: sit, train, yard
A train sits in an otherwise empty train yard.