Protest is related to Talk. Talk is related to Communication. Writing can be used for Communication. Writing is related to Introduce. 
Operation is a type of Surgery. Operation is related to Knife. Knife can be used for Opening. Opening is similar to Beginning. 
Protest <--RelatedTo--> Talk <--RelatedTo--> Communication <--UsedFor-- Writing <--RelatedTo--> Introduce 
Surgery <--IsA-- Operation <--RelatedTo--> Knife --UsedFor--> Opening <--SimilarTo--> Beginning 