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.

Example Input: Sentence1: Climate Forests stabilize climate.
Sentence2: forests stabilize what is generally described in terms of temperature and moisture.
Example Output: Forests

Example Input: Sentence1: Petals attract pollinators to the flower.
Sentence2: Something a daisy has attracts pollinators.
Example Output: attract

Example Input: Sentence1: preventing the transfer of heat from an organims 's body causes that organism to keep warm.
Sentence2: Preventing the transfer of energy from an organism's body keeps it warm.
Example Output:
's