id	keyword
american_scientific_journal-6219	oral
american_scientific_journal-6219	cancer
american_scientific_journal-6219	risk
american_scientific_journal-6219	pakistan
american_scientific_journal-6219	tobacco
american_scientific_journal-6219	research
american_scientific_journal-6219	factors
american_scientific_journal-6219	smoking
american_scientific_journal-6219	scientific