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In one study a specially designed mutant of " Candida antarctica " was found to be an effective catalyst for the Michael addition of acrolein with acetylacetone at 20 " °C in absence of additional solvent .
 biology: Candida antarctica
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
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Text: {0} 
Answer:
 biology: Candida antarctica