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Key uncertainties remain including how have the driving forces for hypoxia , e . g . , climate ( 19 ) and nutrient loading , changed through time in the Baltic Sea coastal zone , and do they vary during the same time periods that hypoxia varies in the open waters ? ( 16 )
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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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