192317
Robert Erwin Johnson ( 3 February 1923 – 28 January 2008 ) was a University of Alabama professor of history and considered " one of the finest scholars of the nineteenth century U.S. Navy and U.S. Coast Guard " .
 Erwin Johnson, University of Alabama, U.S. Navy, U.S. Coast Guard
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Erwin Johnson, University of Alabama, U.S. Navy, U.S. Coast Guard