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.

Input: Consider Input: Sentence1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens. 
Sentence2: Some of the antibodies, antophospholipid antibodies, cause blood clots.

Output: Antibodies


Input: Consider Input: Sentence1: Blood is a fluid connective tissue. 
Sentence2: A fluid connective tissue carries oxygen to the brain.

Output: connective


Input: Consider Input: Sentence1: Cnidarians are invertebrates such as jellyfish and corals. 
Sentence2: Cnidarians include jellyfish and anemones.


Output: Cnidarians