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.
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Question: Sentence1: Translation reads the genetic code in mRNA and makes a protein. 
Sentence2: Nucleotide sequences are read in mRNA and a protein is made.

Answer: mRNA


Question: Sentence1: triceps contracting causes a person 's elbow to straighten. 
Sentence2: muscles contracting cause a person's elbow to straighten.

Answer: contracting


Question: Sentence1: Mammals generate heat mainly by keeping their metabolic rate high. 
Sentence2: tree squirrels generate heat mainly by keeping their metabolic rate high.

Answer:
generate