Q: Keywords: butterfly, leaf, underside
What is a sentence that includes all these keywords?

A: white butterfly with black spots and stripes rests on the underside of a green leaf

Q: Keywords: cake, cupcake, piece
What is a sentence that includes all these keywords?

A: there is a cupcake and a piece o cake on a plate

Q: Keywords: moment, observe, silence
What is a sentence that includes all these keywords?

A:
Some people are observing a moment of silence.