{HEAD ~ The spent water} can be concentrated to {TAIL ~ a caffeine content} of from about 7 to about 30% by weight 
concentrated to
{ HEAD ~ The spent water } can be concentrated to { TAIL ~ a caffeine content } of from about 7 to about 30 % by weight
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH