Send is a synonym of Pass. Pass is a synonym of Deliver. 
Signature is related to Note. Note is related to Classroom. you are likely to find Flag in/at/on Classroom. Flag is related to Blue. 
Send <--Synonym--> Pass <--Synonym--> Deliver 
Signature <--RelatedTo--> Note <--RelatedTo--> Classroom <--AtLocation-- Flag <--RelatedTo--> Blue 