Lecture is related to Educational. Educational is related to Class. Class is related to Second. Second is a type of Date. 
Earnings is a synonym of Yield. Guilt is etymologically related to Yield. Guilt is related to Feeling. Feeling is related to Care. 
Lecture <--RelatedTo--> Educational <--RelatedTo--> Class <--RelatedTo--> Second --IsA--> Date 
Earnings <--Synonym--> Yield <--EtymologicallyRelatedTo-- Guilt <--RelatedTo--> Feeling <--RelatedTo--> Care 