18040
For the 2006 – 2007 school year , a total of eleven schools were selected in three large urban districts where the graduation rate was well below the national average and minority enrollment was above 50 % .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None