 Complete the following phrase:  The ISU began to develop rules, standards, and international tests for ice dance in the 1950s. The first international ice dance competition occurred as a special event during the 1950 World Figure Skating Championships in London; Lois Waring and Michael McGean of the U.S. won the event, much to the embarrassment of the British, who considered themselves the best ice dancers in the world. A second event was planned the following year, at the 