Q: Keywords: fall, firework, sky
What is a sentence that includes all these keywords?

A: fireworks falling from the sky

Q: Keywords: building, function, shop
What is a sentence that includes all these keywords?

A: building function and shop in the town

Q: Keywords: centre, flower, petal
What is a sentence that includes all these keywords?

A:
a bee feeds from the pale purple flower with thin petals and a yellow centre