11768
During the late 1970s , he was part of a musical `` brat pack '' -- a group of budding virtuosos who studied at the Juilliard School with the noted pedagogue Dorothy DeLay .
 date: the late 1970s; organization: the Juilliard School; person: Dorothy DeLay
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
 Entities: the late 1970s, the Juilliard School, Dorothy DeLay 
Answer:
 date: the late 1970s; organization: the Juilliard School; person: Dorothy DeLay