Speed of training and cost efficiencies are obtained by providing {HEAD ~ training} at {TAIL ~ a rate} two to three times faster than the previous art 
at
Speed of training and cost efficiencies are obtained by providing { HEAD ~ training } at { TAIL ~ a rate } two to three times faster than the previous art
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH