Comedy is related to Humor. Writing can be used for Humor. Writing is related to Communicate. Communication is derived from Communicate. 
Trace is a type of Detect. Detect is related to Smell. Smell is related to Garlic. Garlic is related to Prevention. 
Comedy <--RelatedTo--> Humor <--UsedFor-- Writing <--RelatedTo--> Communicate <--DerivedFrom-- Communication 
Trace --IsA--> Detect <--RelatedTo--> Smell <--RelatedTo--> Garlic <--RelatedTo--> Prevention 