their local wine
... that the 1503 Challenge of Barletta was sparked by a French knight who insulted the Italians, having consumed too much of their local wine?
... that the 1503 <a href="./Challenge_of_Barletta" id="mwFnY" rel="mw:WikiLink" title="Challenge of Barletta">Challenge of Barletta</a> was sparked by a French knight who insulted the Italians, having consumed too much of <b id="mwFnc"><a href="./Rosso_Barletta_DOC" id="mwFng" rel="mw:WikiLink" title="Rosso Barletta DOC">their local wine</a></b>?