id	keyword
alces-1889	moose
alces-1889	forage
alces-1889	protein
alces-1889	alces
alces-1889	isle
alces-1889	royale
alces-1889	content
alces-1889	doi
alces-1889	summer
alces-1889	quality
alces-1889	et al
alces-1889	nitrogen