26645
But although he did not study at NTNU , he went to teach there , and has been there for over 20 years .
 organization: NTNU; date: over 20 years
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: NTNU, over 20 years 
Answer:
 organization: NTNU; date: over 20 years