{TAIL ~ This invention} provides {HEAD ~ six new cell lines} which were established in continuous culture from embryonic tissues of ticks  
{ TAIL ~ This invention } provides { HEAD ~ six new cell lines } which were established in continuous culture from embryonic tissues of ticks
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH