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: Similarly, stars are referred to as suns, but our star is the Sun.
Sentence2: our star causes water to evaporate more quickly by adding heat.
Example Output: our

Example Input: Sentence1: Without light there is no sense of vision.
Sentence2: Glass causes a sense of vision.
Example Output: sense

Example Input: Sentence1: Brakes work because friction acts against slip.
Sentence2: braking causes the temperature of an object to increase.
Example Output:
Brakes