id	keyword
american_scientific_journal-5937	soil
american_scientific_journal-5937	engineering
american_scientific_journal-5937	ratio
american_scientific_journal-5937	properties
american_scientific_journal-5937	test
american_scientific_journal-5937	pressure
american_scientific_journal-5937	index
american_scientific_journal-5937	technology
american_scientific_journal-5937	sciences