Ongoing is related to Continue. Continue is related to Action. Action is related to Forbid. 
you are likely to find Lawn in/at/on Suburb. Suburb is the opposite of City. City is related to District. District is a synonym of Territory. 
Ongoing <--RelatedTo--> Continue <--RelatedTo--> Action <--RelatedTo--> Forbid 
Lawn --AtLocation--> Suburb <--Antonym--> City <--RelatedTo--> District <--Synonym--> Territory 