CREATE TABLE table_29517 ("Year" TEXT, "Summits" TEXT, "Country" TEXT, "Continent" TEXT, "Elevation ft" FLOAT, "Elevation m" FLOAT)

what is the elevation of south america?
SELECT "Elevation ft" FROM table_29517 WHERE "Continent" = 'South America'
SELECT "Elevation ft" FROM "table_29517" WHERE "Continent" = 'South America'