Xcelerator
Xcelerator is a steel launched roller coaster at Knott's Berry Farm in Buena Park , California . 
<triplet> Xcelerator <subj> steel <obj> instance of <triplet> steel <subj> roller coaster <obj> subclass of <triplet> launched <subj> roller coaster <obj> subclass of <triplet> Knott's Berry Farm <subj> Buena Park, California <obj> location