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.

Sentence1: Without light there is no sense of vision. 
Sentence2: Glass causes a sense of vision.
sense

Sentence1: Bacteria and Viruses Bacteria and viruses can cause diseases. 
Sentence2: bacteria can have a negative impact on an organism.
Bacteria

Sentence1: Cell division is by mitosis . 
Sentence2: mitosis is required by division.

mitosis