TASK 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.
PROBLEM: Sentence1: Digestion is the process of breaking down food into components the body can absorb. 
Sentence2: Saliva starts to break down the food.

SOLUTION: breaking

PROBLEM: Sentence1: sharpening an object causes that object to change shape. 
Sentence2: sharpening a knife causes it to change shape.

SOLUTION: causes

PROBLEM: Sentence1: Anglers catch a wide variety of delicious fish and many eat the fish they catch. 
Sentence2: a beak is used for eating fish by some birds.

SOLUTION:
eat