You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.

[Q]: Context : His rule ended with a coup by his brother Ghezo who then erased Adandozan from the official history resulting in high uncertainty about many aspects of his life. 
Subject : Adandozan 
Relation : date of death
[A]: What was the date of Adandozan's death?


[Q]: Context : During his final years, Warner Jorgenson had Alzheimer's disease. 
Subject : Warner Jorgenson 
Relation : medical condition
[A]: What was the sickness that killed Warner Jorgenson?


[Q]: Context : The Caledonian Railway 670 Class was a class of 0-4-2 steam locomotives designed by George Brittain for the Caledonian Railway (CR) and introduced in 1878. 
Subject : Caledonian Railway 670 Class 
Relation : service entry
[A]:
Which was the official year for the approval of Caledonian Railway 670 Class?