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
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None