Period is related to Summer. Summer is related to Hot. Hot is the opposite of Cool. Cool is related to Exciting. 
Instructor is related to Like. Like is related to Song. Song is the opposite of Dance. 
Period <--RelatedTo--> Summer <--RelatedTo--> Hot <--Antonym--> Cool <--RelatedTo--> Exciting 
Instructor <--RelatedTo--> Like <--RelatedTo--> Song <--Antonym--> Dance 