A continuous paper web is provided from {HEAD ~ a source} that is {TAIL ~ the first component} of such a system 
is
A continuous paper web is provided from { HEAD ~ a source } that is { TAIL ~ the first component } of such a system
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH