{HEAD ~ This invention} relates to {TAIL ~ a Group 8 metal containing catalyst compound} for the metathesis of olefins 
relates to
{ HEAD ~ This invention } relates to { TAIL ~ a Group 8 metal containing catalyst compound } for the metathesis of olefins
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH