instruction:
Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.
question:
Fact: Vertebrates have a complete digestive system and a closed circulatory system. 
Question: vertebrates have a complete digestive system and a what?
answer:
closed circulatory system.


question:
Fact: High pressure systems cause calm weather conditions. 
Question: High pressure systems cause what weather conditions?
answer:
calm.


question:
Fact: lakes are difficult to find in deserts. 
Question: Where is one least likely to find a lake?
answer:

Mojave desert.