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: Among families with children the average number of offspring is 1.8. 
Sentence2: information in an organism's chromosomes cause genetic traits to be passed down to that organism's children.

SOLUTION: children

PROBLEM: Sentence1: waxy leaves are used for storing water by some plants. 
Sentence2: waxy leaves are used for water conservation by some plants.

SOLUTION: leaves

PROBLEM: Sentence1: Light passing through a prism is refracted or divided into the colors of the spectrum. 
Sentence2: A prism is used to split light into colors.

SOLUTION:
Light