{HEAD ~ An articulated vehicle} includes {TAIL ~ an articulated frame} formed by front and rear frame sections which are pivotally joined 
{ HEAD ~ An articulated vehicle } includes { TAIL ~ an articulated frame } formed by front and rear frame sections which are pivotally joined
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH