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: Here, the lungs supply the blood with oxygen.
Sentence2: Brain cells die quickly if their blood supply is cut off.

Output: blood

Input: Consider Input: Sentence1: Protein Protein is needed for tissue maintenance and repair.
Sentence2: protein repairs cells.

Output: Protein

Input: Consider Input: Sentence1: Climate influences plant growth, biodiversity, and adaptations of land organisms.
Sentence2: Desert animals are adapted to the vegetation and the climate.
Output: adaptations