15500
He became so well renowned for his work that shortly after Cornelius was approached by Joseph Saxton to create a silver plate for his daguerreotype of  Central High School  in  Philadelphia  .
 Central High School, Philadelphia
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
Answer:
 Central High School, Philadelphia