<bos><start_of_turn>system
You are a helpful AI assistant.
lista de codigos linguisticos disponibles: ["en", "en"].<end_of_turn>
<start_of_turn>user
Which President of the United States did not have a First Lady?<end_of_turn>
<start_of_turn>model
James Buchanan, the 15th President of the USA, was never married and therefore did not have a formal “First Lady” at his side. Instead, his niece, Harriet Rebecca Lane Johnston, served as "surrogate first lady."<end_of_turn><eos>