were introduced to the United States
... that Belgian waffles were introduced to the United States at the 1964 New York World's Fair?
... that <a href="./Belgian_waffle" id="mwA84" rel="mw:WikiLink" title="Belgian waffle">Belgian waffles</a> <b id="mwA88"><a href="./Food_at_the_1964_New_York_World's_Fair" id="mwA9A" rel="mw:WikiLink" title="Food at the 1964 New York World's Fair">were introduced to the United States</a></b> at the <a href="./1964_New_York_World's_Fair" id="mwA9E" rel="mw:WikiLink" title="1964 New York World's Fair">1964 New York World's Fair</a>?