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: If there is no movement friction is zero.
Sentence2: Movement causes the temperature of an object to increase.
answer:
movement

question:
Sentence1: Oil and gasoline are fossil fuels.
Sentence2: lawn mowers convert fossil fuels into motion.
answer:
fossil

question:
Sentence1: Refrigerate cold foods at 40 degrees F or lower until serving time.
Sentence2: Keeping food at 40 degrees F or lower is used for keeping food fresh.
answer:
40