instruction:
Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.
question:
Sentence1: An accounting period is simply a period of time. 
Sentence2: seconds are used to measure a period.
answer:
period


question:
Sentence1: Graphite and diamond are polymorphs of carbon. 
Sentence2: carbon polymorphs are used for making pencil lead.
answer:
carbon


question:
Sentence1: Repel- To push away from each other. 
Sentence2: Magnetism can cause objects to push each other away.
answer:

away