Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence1: Viruses infect and live inside the cells of living organisms. 
Sentence2: Yeast is a living organism.
Student:
living