Afford is related to Effort. Strain is a type of Effort. Strain is a synonym of Filter. 
Bay is a type of Talk. Talk is a synonym of Language. Language is related to Lesson. Lesson is related to History. 
Afford <--RelatedTo--> Effort <--IsA-- Strain <--Synonym--> Filter 
Bay --IsA--> Talk <--Synonym--> Language <--RelatedTo--> Lesson <--RelatedTo--> History 