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

Answer: important


Question: Sentence1: Flatworms Flatworms or Platyhelminthes include flukes, tapeworms, and turbellarians. 
Sentence2: Tapeworms belong to the phylum Platyhelminthes.

Answer: tapeworms


Question: Sentence1: Animals adapt to cold temperatures. 
Sentence2: Extremes in temperature can kill animals.

Answer:
temperatures