The COR is {HEAD ~ a direct measure} of the resilience of {TAIL ~ a golf ball} at a particular inbound velocity 
The COR is { HEAD ~ a direct measure } of the resilience of { TAIL ~ a golf ball } at a particular inbound velocity
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH