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: Every photograph is produced by a camera. 
Sentence2: Photographers record images.

SOLUTION: photograph

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: Organs of excretion make up the excretory system. 
Sentence2: Excretion begins with the kidneys.

SOLUTION:
Organs