CREATE TABLE table_70555 ("Date" CLOB, "Home captain" CLOB, "Away captain" CLOB, "Venue" CLOB, "Result" CLOB)

Who was the away captain at Waca Ground?
SELECT "Away captain" FROM table_70555 WHERE "Venue" = 'waca ground'
SELECT "Away captain" FROM "table_70555" WHERE "Venue" = 'waca ground'