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: Some herbivores have more than one stomach. 
Sentence2: Camels are an herbivore.

SOLUTION: herbivores

PROBLEM: Sentence1: Specialization occurs when competing species evolve different adaptations. 
Sentence2: evolving different adaptations increases survival.

SOLUTION: adaptations

PROBLEM: Sentence1: Climate is the average weather in an area over a long period of time. 
Sentence2: Climate Indonesia's climate is definitely tropical.

SOLUTION:
Climate