The aerosol container has {TAIL ~ an aerosol valve} from which {HEAD ~ the contents} exit the container 
from exit
The aerosol container has { TAIL ~ an aerosol valve } from which { HEAD ~ the contents } exit the container
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH