id	keyword
cana-4349	construction
cana-4349	projects
cana-4349	railway
cana-4349	schedule
cana-4349	vol
cana-4349	metro
cana-4349	saudi
cana-4349	overruns
cana-4349	triggers
cana-4349	delays
cana-4349	arabia
cana-4349	analysis
cana-4349	riyadh
cana-4349	doi
cana-4349	faii