18763
Its formal name is ( 4E ,6 Z ) - Octa-4 ,6 - dienoic acid , and it consists of an unusual pair of conjugated alkene units with the E and Z configurations .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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