76860
He befriends a grad-student there who admires his nascent constructions and arranges to allow him unlimited access to the largely abandoned classical electronic music studio and tape machines where , driving up from Philadelphia , he creates his first works for the medium in after-hours sessions .
 Philadelphia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Philadelphia