Couple is a type of Attach. Fellow is part of Couple. Fellow is related to Person. Person wants (to) Observe. 
Transmit is a synonym of Transfer. Transfer is related to Fan. you are likely to find Fan in/at/on Window. Window is related to Curtain. 
Attach <--IsA-- Couple <--PartOf-- Fellow <--RelatedTo--> Person --Desires--> Observe 
Transmit <--Synonym--> Transfer <--RelatedTo--> Fan --AtLocation--> Window <--RelatedTo--> Curtain 