Sentence:  The Dutch Reformed Church , with two steeples and its <WSD>own</WSD> school was on Main Street ; the Episcopal Church was one block down Sussex Street ; the Catholic Saint Mary's Church , with an even taller steeple and a cross on top , stood on Ball Street . 
Meaning of the word marked with <WSD> tags:  belonging to or on behalf of a specified person (especially yourself); preceded by a possessive