Tunnel is related to Road. Road is related to Sidewalk. Sidewalk is a synonym of Walk. Walk is related to Still. 
you are likely to find Town in/at/on State. you are likely to find School in/at/on Town. School is related to Fish. 
Tunnel <--RelatedTo--> Road <--RelatedTo--> Sidewalk <--Synonym--> Walk <--RelatedTo--> Still 
State <--AtLocation-- Town <--AtLocation-- School <--RelatedTo--> Fish 