id	keyword
brj-22016	cattle
brj-22016	straw
brj-22016	cattle stomach
brj-22016	manure
brj-22016	cattle manure
brj-22016	production
brj-22016	fermentation
brj-22016	gas
brj-22016	simulation
brj-22016	gas production
brj-22016	corn
brj-22016	anaerobic