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.

Ex Input:
Sentence1: if fossils of a water animal or plant are found in a place then that place used to be covered by water in the past. 
Sentence2: Fossils of a water animal or plant are located in water-laid sediments.

Ex Output:
animal


Ex Input:
Sentence1: soil is formed by weathering. 
Sentence2: Something described as loamy is formed by weathering.

Ex Output:
formed


Ex Input:
Sentence1: Consumers take in food by eating producers or other living things. 
Sentence2: Consumers can avoid poisoning by not eating.

Ex Output:

Consumers