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: camouflage is used for protection by prey against predators. 
Sentence2: blending is used for protection.
answer:
protection


question:
Sentence1: Blood type is important for medical reasons. 
Sentence2: Type O is important for medical reasons.
answer:
important


question:
Sentence1: Some plants, like cactus, have a water storage system. 
Sentence2: Some plants have a water storage system in their stem.
answer:

Some