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Recent studies indicate that dietary supplements of antioxidants and omega - 3 and omega - 6 fatty acids may reduce the cognitive deficits in AD patients .
 Chemical: omega - 3 and omega - 6 fatty acids
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: omega - 3 and omega - 6 fatty acids