This invention relates to processing biomass, such as methods and {HEAD ~ systems} for processing {TAIL ~ biomass} 
This invention relates to processing biomass , such as methods and { HEAD ~ systems } for processing { TAIL ~ biomass }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL