{HEAD ~ An umbrella structure} includes a cover, a shaft, a notch, a runner, main ribs and {TAIL ~ stretchers} 
includes
{ HEAD ~ An umbrella structure } includes a cover , a shaft , a notch , a runner , main ribs and { TAIL ~ stretchers }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL