Grand Slam of Curling
The Grand Slam of Curling ( currently known as the Pinty's Grand Slam of Curling ) is a series of curling bonspiels that are a part of the annual World Curling Tour . 
<triplet> Grand Slam of Curling <subj> curling <obj> sport <triplet> Grand Slam of Curling <subj> curling <obj> sport <triplet> bonspiel <subj> curling <obj> sport <triplet> World Curling Tour <subj> curling <obj> sport <subj> bonspiel <obj> subclass of