 Complete the following phrase:  The new preparatory school began functioning at the San Ildefonso building with more than 700 day students and 200 live-in students. The complex remained a separate entity until 1929, when the Universidad Nacional gained autonomy, meaning it became independent of the government, though still government-sponsored. The Preparatory School became part of the newly independent university system, being designated as Preparatory 1 for a short time. As part of the 