Additional is a synonym of Other. Other is related to Blue. Blue is a different concept from Red. Red is related to Bed. 
one thing you do when you Reading is Laugh. Person wants (to) Laugh. Person is related to Correspondent. 
Additional <--Synonym--> Other <--RelatedTo--> Blue <--DistinctFrom--> Red <--RelatedTo--> Bed 
Reading --HasSubevent--> Laugh <--Desires-- Person <--RelatedTo--> Correspondent 