183857
Hackman was apprentice d to a mercer , and although according to some accounts he became a member of St John 's College , Cambridge , no record of this can be traced at Cambridge .
 Hackman, St John 's College , Cambridge, Cambridge
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hackman, St John 's College , Cambridge, Cambridge