902
Students in public school for grades 9 - 12 attend the Delaware Valley Regional High School , part of the Delaware Valley Regional High School District , which serves almost 1,000 students in western Hunterdon County .
 Delaware Valley Regional High School, Delaware Valley Regional High School District, Hunterdon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Delaware Valley Regional High School, Delaware Valley Regional High School District, Hunterdon