Complex sentence: It was established in 1975 as Davao Doctors Hospital School of Nursing (DDHSN) and a three-year basic course in Nursing was the only course offered.
Split into simpler sentences: It was established in 1975 and was first known as Davao Doctors Hospital School of Nursing (DDHSN). Back then, a three-year basic course in Nursing was the only course offered.