A pack containing an article such as {HEAD ~ a bar} of {TAIL ~ soap} consists of an inner tubular liner within an outer wrapper 
of
A pack containing an article such as { HEAD ~ a bar } of { TAIL ~ soap } consists of an inner tubular liner within an outer wrapper
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH