Model is a type of Leader. Model is a synonym of Ideal. Ideal is a type of Goal. Goal is a synonym of Target. 
Sign is related to Note. Note is related to Like. Like is related to Double. Double is related to Math. 
Leader <--IsA-- Model <--Synonym--> Ideal --IsA--> Goal <--Synonym--> Target 
Sign <--RelatedTo--> Note <--RelatedTo--> Like <--RelatedTo--> Double <--RelatedTo--> Math 