id	keyword
american_scientific_journal-1814	figure
american_scientific_journal-1814	load
american_scientific_journal-1814	gls
american_scientific_journal-1814	girder
american_scientific_journal-1814	bridge
american_scientific_journal-1814	x1(g1)x2(g2)x3(g3)x4(g4
american_scientific_journal-1814	model
american_scientific_journal-1814	steel
american_scientific_journal-1814	level