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: Contact with infected blood, contaminated needles. 
Sentence2: scraping oneself on an infected needle may cause infection.
answer:
infected


question:
Sentence1: Basically the process is pretty simple. 
Sentence2: All cells share some of the same structures and simple processes.
answer:
process


question:
Sentence1: fire converts chemical energy into light and heat energy. 
Sentence2: Fires are large uncontrolled flames.
answer:

fire