More specifically, {HEAD ~ the invention} relates to {TAIL ~ methods} of enhancing bitumen recovery and improving froth quality by reducing mineral content in mining oil sands extraction processes 
relates to
More specifically , { HEAD ~ the invention } relates to { TAIL ~ methods } of enhancing bitumen recovery and improving froth quality by reducing mineral content in mining oil sands extraction processes
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH