id	keyword
assc-56180	delivery
assc-56180	system
assc-56180	logistics
assc-56180	transportation
assc-56180	drone
assc-56180	network
assc-56180	vehicle
assc-56180	altitude
assc-56180	economy
assc-56180	science
assc-56180	platform
assc-56180	technology
assc-56180	costs
assc-56180	time