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: Earthquakes cause massive damage. 
Sentence2: tectonic plates being pushed together causes massive damage.

Output: damage


Input: Consider Input: Sentence1: if an organism becomes too hot then that organism may die. 
Sentence2: if an organism overheats then that organism may die.

Output: die


Input: Consider Input: Sentence1: building housing developments usually requires replacing animal habitats. 
Sentence2: And as the habitat disappears, so do the animals which depend upon it for survival.


Output: animal