id	keyword
american_scientific_journal-7458	tunnel
american_scientific_journal-7458	figure
american_scientific_journal-7458	engineering
american_scientific_journal-7458	area
american_scientific_journal-7458	water
american_scientific_journal-7458	support
american_scientific_journal-7458	clay
american_scientific_journal-7458	cavity
american_scientific_journal-7458	rock