376211
However , their calcitic shells , the position of the muscle scars , and putative association with secondary shell elements , make a brachiopod affinity possible , by analogy with the mobergellans : a group of phosphatic shells from the same time period , with a similar set of muscle scars .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None