Nervous is a different concept from Cool. Cool is related to Fall. 
Meal is related to Lunch. Lunch is related to Sack. Sack is a synonym of Dismiss. Dismiss is a type of Reject. 
Nervous <--DistinctFrom--> Cool <--RelatedTo--> Fall 
Meal <--RelatedTo--> Lunch <--RelatedTo--> Sack <--Synonym--> Dismiss --IsA--> Reject 