One aspect of {TAIL ~ the invention} provides an igniter for igniting a fuel air mixture in {HEAD ~ a combustion chamber} 
One aspect of { TAIL ~ the invention } provides an igniter for igniting a fuel air mixture in { HEAD ~ a combustion chamber }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD