{TAIL ~ Exemplary} of {HEAD ~ such a system} is a MgCl2 supported TiCl3  
{ TAIL ~ Exemplary } of { HEAD ~ such a system } is a MgCl2 supported TiCl3
TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH