id	keyword
american_scientific_journal-4969	samples
american_scientific_journal-4969	14c
american_scientific_journal-4969	age
american_scientific_journal-4969	depth
american_scientific_journal-4969	benzene
american_scientific_journal-4969	technology
american_scientific_journal-4969	journal
american_scientific_journal-4969	liquid
american_scientific_journal-4969	figure
american_scientific_journal-4969	research