one thing you do when you Drown is Die. Drown is the opposite of Swim. Swim is related to Human. 
Builder is related to Construction. Construction is related to Nest. Nest is related to Collection. 
Die <--HasSubevent-- Drown <--Antonym--> Swim <--RelatedTo--> Human 
Builder <--RelatedTo--> Construction <--RelatedTo--> Nest <--RelatedTo--> Collection 