In this task, you are given a sentence and a question, you would be asked to create the answer which is contained in the sentence provided.

Sentence: Single-celled organisms are prokaryotes. Question: What kind of organisms are prokaryotes?
single-celled

Sentence: Ion drives have low thrust but high efficiency. Question: Ion drives have low thrust but high what?
efficiency

Sentence: If only one atom of a specific type is present a subscript is not used. Question: If only one atom of a specific type is present what is not used?

subscript