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: Pedigree A pedigree is a map of the types of hemoglobin in the family tree. 
Sentence2: a map of the types of hemoglobin in the family tree is a useful tool for studying inheritance patterns.

SOLUTION: family

PROBLEM: Sentence1: Stress is the applied force, strain is the change in shape. 
Sentence2: Paper is crumbled when stress and strain is applied in order to change the shape.

SOLUTION: Stress

PROBLEM: Sentence1: Cytokinesis is the final stage of cell division in eukaryotes as well as prokaryotes. 
Sentence2: Prokaryotes All bacteria are prokaryotes.

SOLUTION:
prokaryotes