Complex sentence: Four pioneer teachers were assigned in Santisimo Rosario Annex named Ronie Nacario was the first designated as Teacher-in-Charge, Teresa Yema, Maritess Fandiño, and Michelle D. Benedictos.
Split into simpler sentences: Four pioneer teachers were assigned in Santisimo Rosario Annex. They were Mr. Ronie Nacario who was the first designated as Teacher-in-Charge, Mrs. Teresa Yema, Miss Maritess Fandiño, and Miss Michelle D. Benedictos.