{HEAD ~ The field} relates generally to {TAIL ~ the field} of controls and, more particularly, to method and apparatus for controlling dispensers and for detecting users 
relates generally to
{ HEAD ~ The field } relates generally to { TAIL ~ the field } of controls and , more particularly , to method and apparatus for controlling dispensers and for detecting users
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH