Mentor is a type of Intellectual. Intellectual is related to Mental. Mental is related to Dream. Dream is related to Illusion. 
Plain is a different concept from Fantastic. Fantastic is a synonym of Wild. 
Mentor --IsA--> Intellectual <--RelatedTo--> Mental <--RelatedTo--> Dream <--RelatedTo--> Illusion 
Plain <--DistinctFrom--> Fantastic <--Synonym--> Wild 