8397
In  1977  the University of Houston celebrated its 50th anniversary as the Texas Legislature established the  University of Houston System  a state system of higher education that includes and governs four universities .
 founded: 1977, University of Houston System
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  1977, University of Houston System 
Answer:
 founded: 1977, University of Houston System