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