{HEAD ~ Removal methods} include heating and {TAIL ~ rectification}, absorption using a water absorbent, or a combination of these methods 
include
{ HEAD ~ Removal methods } include heating and { TAIL ~ rectification } , absorption using a water absorbent , or a combination of these methods
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH