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: Dromaeosaurs are part of the theropod group of dinosaurs. 
Sentence2: Birds evolved from a group of bipedal dinosaurs that included Dromaeosaurs.

SOLUTION: Dromaeosaurs

PROBLEM: Sentence1: Flies are insects with two wings. 
Sentence2: Flies are arthropods with two wings.

SOLUTION: Flies

PROBLEM: Sentence1: Mutations that lead to cancer usually occur in genes that control the cell cycle. 
Sentence2: radiation can affect genes that control the cell cycle.

SOLUTION:
cell