Sandy Allan
... that footballer Sandy Allan was the first player to score a headed hat-trick in a European club competition?
... that footballer <b id="mwAy8"><a href="./Sandy_Allan" id="mwAzA" rel="mw:WikiLink" title="Sandy Allan">Sandy Allan</a></b> was the first player to score a headed <a href="./Hat-trick#Association_football" id="mwAzE" rel="mw:WikiLink" title="Hat-trick">hat-trick</a> in a <a href="./UEFA_competitions" id="mwAzI" rel="mw:WikiLink" title="UEFA competitions">European club competition</a>?