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: Heterotrophs get food by eating other living things. 
Sentence2: fish eat other living things.
answer:
living


question:
Sentence1: If there is no movement friction is zero. 
Sentence2: Movement causes the temperature of an object to increase.
answer:
movement


question:
Sentence1: A low melting point will lower the heat needed. 
Sentence2: adding salt to a liquid lowers the heat needed to melt it.
answer:

heat