id	keyword
american_scientific_journal-7244	graptopetalum
american_scientific_journal-7244	paraguayense
american_scientific_journal-7244	activity
american_scientific_journal-7244	compounds
american_scientific_journal-7244	infections
american_scientific_journal-7244	plant
american_scientific_journal-7244	journal
american_scientific_journal-7244	extract
american_scientific_journal-7244	virus
american_scientific_journal-7244	walther