Produce a sentence which mentions all of these concepts: harp, sit, tune

An elderly man sits and plays a tune on a harp

Produce a sentence which mentions all of these concepts: hammock, relax, summer

no better way to celebrate summer than relaxing in a hammock

Produce a sentence which mentions all of these concepts: explorer, piano, remain, rot, shine
One of the robotic explorer shines its lights on the rotted remains of a grand piano.