id	keyword
american_scientific_journal-8894	cities
american_scientific_journal-8894	energy
american_scientific_journal-8894	system
american_scientific_journal-8894	development
american_scientific_journal-8894	planning
american_scientific_journal-8894	management
american_scientific_journal-8894	transportation
american_scientific_journal-8894	traffic
american_scientific_journal-8894	efficiency