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: Blood type is important for medical reasons. 
Sentence2: Type O is important for medical reasons.

SOLUTION: important

PROBLEM: Sentence1: a circle graph can be used to display percents. 
Sentence2: pie charts are circle graphs.

SOLUTION: circle

PROBLEM: Sentence1: An induction coil is simply a metal rod that is encircled by many turns of a copper wire. 
Sentence2: An electric current forms when a magnet is run through an induction coil.

SOLUTION:
induction