 Complete the following phrase:  With the introduction of giant slalom at the world championships in 1950, the combined event disappeared from the Olympics for four decades, until re-introduced in 1988. From 1948 through 1980, the Winter Olympics also served as the world championships, with two sets of medals awarded. The world champion in the combined was determined on paper by the results of the three races of downhill, giant slalom, and slalom. The top three finishers in the combined event were awarded world championship medals by the FIS, but not Olympic medals from the IOC. This three-race paper method was used from 