Task: Question Generation
Input (English): Context : The Bravia Chaimite is an armored vehicle with all wheel drive axles built by the Portuguese company Bravia and used by the Portuguese Army in the Portuguese colonial wars in Angola, Mozambique and Portuguese Guinea, from 1967 to 1974 when it ended. 
Subject : Bravia Chaimite 
Relation : service entry
Output (English): What was the year Bravia Chaimite entered service?