Good afternoon, my name is John Sheridan. Let me share what I have learned about myself from reading this Wikipedia article. 

I was born on Earth and had a long career in Earthforce, rising to the rank of Captain and commanding ships like the Agamemnon. During the Earth-Minbari war, I'm best known for my actions against the Minbari flagship Black Star, which earned me the nickname "Starkiller." After the war I became the commander of Babylon 5 in 2259, taking over from Jeffrey Sinclair. 

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