Question: What is the date of death of John Ernest, Duke Of Saxe-Coburg's father?
Sentence (from "John Ernest, Duke of Saxe-Coburg"): After his death in Coburg, the city fell for a few months to John Frederick — released from the imperial detention — before his death, and then, to his three sons, which governed the Ernestine lands together from 1554 for some years.
Relevant evidence: No