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.

[EX Q]: Sentence1: With a spatula, fold in flour mixture. 
Sentence2: a sifter is used for separating flour.
[EX A]: flour

[EX Q]: Sentence1: Among monogamous species of birds and mammals, both parents often care for their offspring. 
Sentence2: The period of parental care after birth for manogamous species are handled by both parents.
[EX A]: monogamous

[EX Q]: Sentence1: Bacteria are the most diverse and abundant group of organisms on Earth. 
Sentence2: bacteria contain a diverse amount of enzymes.
[EX A]:
Bacteria