Complex sentence: St. Vincent School is a private nonsectarian school located in West Ave., Quezon City which offers preschool, grade school and high school, while the Branch in Maginhawa St. Teacher's Village, Quezon City only offers preschool and grade school.
Split into simpler sentences: St. Vincent School is a private nonsectarian school located in West Ave., Quezon City which offers preschool, grade school and high school. The Branch in Maginhawa St. Teacher's Village, Quezon City only offers preschool and grade school.