id	keyword
american_scientific_journal-6317	cone
american_scientific_journal-6317	soil
american_scientific_journal-6317	test
american_scientific_journal-6317	cpt
american_scientific_journal-6317	penetration
american_scientific_journal-6317	engineering
american_scientific_journal-6317	depth
american_scientific_journal-6317	investigation
american_scientific_journal-6317	research
american_scientific_journal-6317	method