Assertion: champagne | /r/HasProperty | favourite of leopold ii of belgium
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Source sentences:
text: Laurent-Perrier's advertisements in late 1890 boasted their Champagne was the favourite of Leopold II of Belgium, George I of Greece, Alfred, Duke of Saxe-Coburg and Gotha, Margaret Cambridge, Marchioness of Cambridge, and John Lambton, 3rd Earl of Durham, among other nobles, knights, and military officers.