89877
In October 1963 , President Kennedy had personally selected a site in Harvard Square near his alma mater , but after his assassination , Cambridge residents actively opposed the Kennedy family 's efforts to build a presidential library there due to traffic concerns .
 Kennedy, Harvard Square, Cambridge, Kennedy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kennedy, Harvard Square, Cambridge, Kennedy