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Alfred Sherwood Romer first considered Procerosuchus to be a possible ornithosuchid , but later assigned it to the family Prestosuchidae , which he constructed in 1966 .
 person: Alfred Sherwood Romer
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: Alfred Sherwood Romer 
Answer:
 person: Alfred Sherwood Romer