The spent solvent is contacted with water to form decaffeinated spent solvent and {TAIL ~ caffeine} containing {HEAD ~ spent water} 
The spent solvent is contacted with water to form decaffeinated spent solvent and { TAIL ~ caffeine } containing { HEAD ~ spent water }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD