Monthly is related to Period. Period is a synonym of Tide. Tide is a type of Variation. 
Journal is related to Writing. Writing is related to Book. Reader is a type of Book. Reader is a type of Textbook. 
Monthly <--RelatedTo--> Period <--Synonym--> Tide --IsA--> Variation 
Journal <--RelatedTo--> Writing <--RelatedTo--> Book <--IsA-- Reader --IsA--> Textbook 