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Walker did not play at all in Somerset 's first team in 1954 , but he reappeared in mid 1955 in the match against Essex at Romford and , having batted at No 6 in the first innings , was promoted to open the second innings .
 person: Walker; organization: Somerset
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: Walker, Somerset 
Answer:
 person: Walker; organization: Somerset