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: Climate refers to weather over a long period of time. 
Sentence2: weather is generally described in terms of temperature and moisture.

SOLUTION: long

PROBLEM: Sentence1: creating wood-free paper does not require cutting down trees. 
Sentence2: creating printed media requires cutting down trees.

SOLUTION: creating

PROBLEM: Sentence1: Frogs also have a larynx, or voice box, to make sounds. 
Sentence2: Some amphibians have a larynx to make sounds to attract.

SOLUTION:
larynx