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