instruction:
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.
question:
Sentence1: Water is essential for all life on Earth. 
Sentence2: H2O is needed for all life on Eartth.
answer:
Earth


question:
Sentence1: a sifter is used for separating mixtures. 
Sentence2: a sifter is used for some recipes.
answer:
sifter


question:
Sentence1: Jaws also make cartilaginous fish excellent predators. 
Sentence2: Jaws also make shark excellent predators.
answer:

Jaws