This is a paraphrasing task. In this task, you're given a sentence and your task is to generate another sentence which express same meaning as the input using different words.
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Question: it explained how a dozen robots could follow when one robot had been summoned , but only when needed and not otherwise .

Answer: it could also explain why one robot was called upon when a robot was called , a dozen - but only when they needed to be .

Question: the sweat on the man 's hand reacted with the steel of the handle and reeked like a steel spoon dipped in vanilla ice cream .

Answer: the sweat on his hand responded with a steel clip and smelled exactly the same as a stainless-steel spoon , dipped in vanilla ice-cream .

Question: why not just dispose of them and be done with it ?

Answer:
why not just get rid of them and have a clean table ?