Definition: 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.
Input: Sentence1: Fungi lack chlorophyll, so they cannot make food by photosynthesis as plants can. 
Sentence2: Fungi cannot absorb solar energy and cannot make food by photosynthesis as plants can.

can