{HEAD ~ Process} for obtaining at least one tertiary olefin by decomposition of {TAIL ~ the corresponding ether} 
{ HEAD ~ Process } for obtaining at least one tertiary olefin by decomposition of { TAIL ~ the corresponding ether }
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL