id	keyword
american_scientific_journal-2972	earthquakes
american_scientific_journal-2972	volcano
american_scientific_journal-2972	events
american_scientific_journal-2972	frequency
american_scientific_journal-2972	volcanoes
american_scientific_journal-2972	journal
american_scientific_journal-2972	nyiragongo
american_scientific_journal-2972	period
american_scientific_journal-2972	research
american_scientific_journal-2972	nyamulagira