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 an object is made of a material then that object has the properties of that material. 
Sentence2: If an object is made of a drug, then that object has the properties of that drug.
answer:
made


question:
Sentence1: Information on DNA is organized into genes. 
Sentence2: DNA codes for proteins.
answer:
DNA


question:
Sentence1: keeping food cold is used for keeping food fresh. 
Sentence2: A refrigerator is used for keeping food fresh.
answer:

food