{TAIL ~ a source} of octenol, separate from the canister containing {HEAD ~ carbon dioxide}, provided in the housing 
{ TAIL ~ a source } of octenol , separate from the canister containing { HEAD ~ carbon dioxide } , provided in the housing
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH