Complex sentence: It later moved to campuses at 32nd and Meridian Streets and the former Charles B. Sommers estate on Cold Spring Road before the 1970 merger with Park School and subsequent move to the College Avenue campus.
Split into simpler sentences: It later moved to campuses at 32nd and Meridian Streets followed by the former Charles B. Sommers estate on Cold Spring Road. After the 1970 merger with Park School it moved to the College Avenue campus.