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: when a river floods , that river deposits soil in flood plains. 
Sentence2: when a river floods, it deposits soil in generally marshy areas.

SOLUTION: deposits

PROBLEM: Sentence1: Mangoes are propagated vegetatively and by seeds. 
Sentence2: animals propagate mangoes.

SOLUTION: Mangoes

PROBLEM: Sentence1: Examples include influenza, rabies, HIV, and Herpes viruses. 
Sentence2: rabies cannot reproduce by themselves.

SOLUTION:
rabies