id	keyword
american_scientific_journal-6149	port
american_scientific_journal-6149	land
american_scientific_journal-6149	land port
american_scientific_journal-6149	circulation
american_scientific_journal-6149	benapole
american_scientific_journal-6149	benapole land
american_scientific_journal-6149	system
american_scientific_journal-6149	efficiency
american_scientific_journal-6149	bangladesh
american_scientific_journal-6149	traffic
american_scientific_journal-6149	transportation
american_scientific_journal-6149	research