The Dark Knight Coaster
The Dark Knight Coaster is the name of three enclosed roller coasters currently operating at three Six Flags amusement parks across North America , those being Six Flags Great Adventure , Six Flags Great America and Six Flags México . 
<triplet> Six Flags Great America <subj> amusement park <obj> instance of <triplet> Six Flags México <subj> amusement park <obj> instance of