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He was an assistant assessor of internal revenue for the state of Michigan prior to 1873 , and prosecuting attorney for Oceana County from 1873 – 1879 , also maintaining a private practice in Grand Rapids , Michigan from 1873 to 1877 , and serving as an assistant U.S. Attorney , for the Western District of Michigan for 1877 to 1881 .
 location: Michigan; location: Oceana County; location: Grand Rapids , Michigan; location: Michigan
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:
 location: Michigan; location: Oceana County; location: Grand Rapids , Michigan; location: Michigan