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: Earth's Atmosphere Earth's atmosphere is the layer of gasses that surrounds the earth. 
Sentence2: weather refers to the conditions in the layer of gasses that surrounds the earth.

SOLUTION: earth

PROBLEM: Sentence1: Heterotrophs get food by eating other living things. 
Sentence2: fish eat other living things.

SOLUTION: living

PROBLEM: Sentence1: skin is used for protecting the body from harmful substances. 
Sentence2: a protective organ is used to protect the body from harmful substances.

SOLUTION:
body