Protest is related to Go. Go is related to Approach. Approach is a synonym of Way. Wagon is etymologically related to Way. 
Companion is a type of Traveler. Traveler is a type of Person. 
Protest <--RelatedTo--> Go <--RelatedTo--> Approach <--Synonym--> Way <--EtymologicallyRelatedTo-- Wagon 
Companion --IsA--> Traveler --IsA--> Person 