id	keyword
ajst-32279	rail
ajst-32279	network
ajst-32279	air
ajst-32279	intermodal
ajst-32279	centrality
ajst-32279	transport
ajst-32279	airport
ajst-32279	hub
ajst-32279	station
ajst-32279	hubs
ajst-32279	node
ajst-32279	northwest