id	keyword
american_scientific_journal-2592	filtering
american_scientific_journal-2592	item
american_scientific_journal-2592	prediction
american_scientific_journal-2592	user
american_scientific_journal-2592	recommendation
american_scientific_journal-2592	centering
american_scientific_journal-2592	rating
american_scientific_journal-2592	mean
american_scientific_journal-2592	error