The ability to control the amount of {HEAD ~ ambient light} entering through a vehicle window and {TAIL ~ window} of a dwelling is particularly useful 
entering through
The ability to control the amount of { HEAD ~ ambient light } entering through a vehicle window and { TAIL ~ window } of a dwelling is particularly useful
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH