4046
The animals thus associated , the Rotifera , Annelida and Arthropoda , are composed of a larger or smaller number of hollow rings , each ring possessing typically a pair of hollow lateral appendages , moved by intrinsic muscles and penetrated by blood-spaces .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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