735
Surprisingly only 4 . 0 % of all sites were classified as seasonally hypoxic according to our definition when > 50 % and < 80 % of profiles during the stratified period have oxygen concentrations less than 2 mg L - 1 .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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