artistic billiards
...that the first artistic billiards world tournament only used ivory balls?
...that the first <b id="mwDUU"><a href="./Artistic_billiards" id="mwDUY" rel="mw:WikiLink" title="Artistic billiards">artistic billiards</a></b> <a href="./World_championship" id="mwDUc" rel="mw:WikiLink" title="World championship">world tournament</a> only used <a href="./Ivory" id="mwDUg" rel="mw:WikiLink" title="Ivory">ivory</a> balls?