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