CREATE TABLE table_63517 ("Year" FLOAT, "Home Team" TEXT, "Away Team" TEXT, "Winner" TEXT, "Score" TEXT)

who is the home team when the away team is rivercity rage?
SELECT "Home Team" FROM table_63517 WHERE "Away Team" = 'rivercity rage'
SELECT "Home Team" FROM "table_63517" WHERE "Away Team" = 'rivercity rage'