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: pesticides cause pollution. 
Sentence2: pollution can harm animals.
Example output: pollution.
Example explanation: The word "pollution" is common to Sentence1 and Sentence2. So, it's a good answer.
Q: Sentence1: Life without protein is impossible. 
Sentence2: life without nitrogen is impossible.
A:
Life
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: pesticides cause pollution. 
Sentence2: pollution can harm animals.
Example output: pollution.
Example explanation: The word "pollution" is common to Sentence1 and Sentence2. So, it's a good answer.
Q: Sentence1: Life without protein is impossible. 
Sentence2: life without nitrogen is impossible.
A:
user
Life
assistant
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: pesticides cause pollution. 
Sentence2: pollution can harm animals.
Example output: pollution.
Example explanation: The word "pollution" is common to Sentence1 and Sentence2. So, it's a good answer.
Q: Sentence1: Life without protein is impossible. 
Sentence2: life without nitrogen is impossible.
A:
Life