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: natural magnetism is used for pointing north by a compass. 
Sentence2: For the ordinary compass, align to the North direction.

Answer: north


Question: Sentence1: Some viruses live in a dormant state inside the body. 
Sentence2: a virus can live in the brain.

Answer: viruses


Question: Sentence1: With the rain comes floods, and with the floods come erosion and landslides. 
Sentence2: landslides are caused by rain.

Answer:
landslides