Sentence:  I found a trooper once the Apache had spread-eagled on an ant hill , and another time we ran across some teamsters they 'd caught , tied upside down on their <WSD>own</WSD> wagon wheels over little fires until their brains was exploded right out o ' their skulls . 
Meaning of the word marked with <WSD> tags:  belonging to or on behalf of a specified person (especially yourself); preceded by a possessive