id	keyword
american_scientific_journal-6319	encoding
american_scientific_journal-6319	problem
american_scientific_journal-6319	vehicle
american_scientific_journal-6319	̅̅ ̅̅
american_scientific_journal-6319	solution
american_scientific_journal-6319	scheme
american_scientific_journal-6319	routing
american_scientific_journal-6319	population
american_scientific_journal-6319	journal