Like is related to Possible. Possible is related to Happen. Chance is a type of Happen. Chance is related to Opportunity. 
Educational is related to Lecture. Lecture is related to Class. 
Like <--RelatedTo--> Possible <--RelatedTo--> Happen <--IsA-- Chance <--RelatedTo--> Opportunity 
Educational <--RelatedTo--> Lecture <--RelatedTo--> Class 