id	keyword
american_scientific_journal-12058	cement
american_scientific_journal-12058	concrete
american_scientific_journal-12058	water
american_scientific_journal-12058	volume
american_scientific_journal-12058	strength
american_scientific_journal-12058	engineering
american_scientific_journal-12058	technology
american_scientific_journal-12058	density
american_scientific_journal-12058	research
american_scientific_journal-12058	sciences