While is related to Slip. Slip is related to Drop. Drop is related to Mistake. Mistake is the opposite of Purpose. 
Learning requires Exposure. Exposure is related to Film. 
While <--RelatedTo--> Slip <--RelatedTo--> Drop <--RelatedTo--> Mistake <--Antonym--> Purpose 
Learning --HasPrerequisite--> Exposure <--RelatedTo--> Film 