5672
Considering the subspecies of widely distributed soft - plumaged petrel for many years , the taxonomic status of the three gadfly petrel taxa breeding in Macaronesia is not yet settled , some authors advocating the presence of three , two or one species .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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