Complex sentence: At Some point before 1952, the school name was changed to Okinawa-American Dependent School and in 1952 during the publication of the 5th Torii, the Dragon was chosen as the Mascot.
Split into simpler sentences: At some point before 1952, the school name was changed to Okinawa-American Dependent School. In 1952 during the publication of the fifth "Torii", the Dragon was chosen as the mascot.