8507
The poem was set to music in 1915 by Franklin L. Sheppard , a close friend of Babcock , who apparently did not want to call attention to himself and signed using his initials rearranged as " S.F.L. " Most sources state that Sheppard adapted the music from a traditional English melody that he learned from his mother as a child .
 Babcock
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Babcock