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.
--------
Question: Sentence1: Moisture is required for the microorganisms to grow. 
Sentence2: Moisture can cause infections to grow.

Answer: Moisture


Question: Sentence1: a wildfire changes an ecosystem drastically. 
Sentence2: Forest fires change an ecosystem drastically.

Answer: changes


Question: Sentence1: Birds evolved from a group of bipedal dinosaurs called theropods. 
Sentence2: Birds evolved from a group of bipedal dinosaurs that included Dromaeosaurs.

Answer:
Birds