Explain is related to Describe. Describe is a synonym of Trace. Trace is a synonym of Trail. Slot is a type of Trail. 
Success would make you want to Celebrate. Success is related to Triumph. 
Explain <--RelatedTo--> Describe <--Synonym--> Trace <--Synonym--> Trail <--IsA-- Slot 
Celebrate <--CausesDesire-- Success <--RelatedTo--> Triumph 