TASK DEFINITION: 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.
PROBLEM: Sentence1: Capillaries are microscopic vessels. 
Sentence2: Lymph is a fluid that leaks out of microscopic vessels into spaces between cells.

SOLUTION: microscopic

PROBLEM: 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.

SOLUTION: our

PROBLEM: Sentence1: Adolescence is a time of significant mental, emotional, and social changes. 
Sentence2: The school leaving age is a time of significant mental, emotional, and social changes.

SOLUTION:
changes