1677
It said the demise of the Net Book Agreement had hurt the British operations , and weak performances from the San Francisco unit of Harper-Collins had not helped .
 British, San Francisco, Net Book Agreement, Harper-Collins
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 British, San Francisco, Net Book Agreement, Harper-Collins