Drift is etymologically related to Drive. Drive is related to Wheel. Wheel is made of Metal. Metal is related to Key. 
Protest is related to Talk. Talk is related to Communication. Writing can be used for Communication. Writing is related to Introduce. 
Drift --EtymologicallyRelatedTo--> Drive <--RelatedTo--> Wheel --MadeOf--> Metal <--RelatedTo--> Key 
Protest <--RelatedTo--> Talk <--RelatedTo--> Communication <--UsedFor-- Writing <--RelatedTo--> Introduce 