Laughter is a type of Sound. Laughter can cause/lead to Happiness. Happiness is related to Health. 
Killing can cause/lead to Investigation. Killing requires Victim. Victim is related to Hostage. Hostage is related to Make. 
Sound <--IsA-- Laughter --Causes--> Happiness <--RelatedTo--> Health 
Investigation <--Causes-- Killing --HasPrerequisite--> Victim <--RelatedTo--> Hostage <--RelatedTo--> Make 