What is the state of the college OU?
SELECT T1.state FROM college AS T1 JOIN tryout AS T2 ON T1.cName   =   T2.cName JOIN player AS T3 ON T2.pID   =   T3.pID WHERE T1.cName   =   'OU'
state of the college refers to T1.state; college named 'OU' refers to T1.cName = 'OU'; joining tables college, tryout, and player on conditions T1.cName = T2.cName and T2.pID = T3.pID;