CREATE TABLE table_51925 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Venue" CLOB, "Date" CLOB)

Which date has an Away team of richmond?
SELECT "Date" FROM table_51925 WHERE "Away team" = 'richmond'
SELECT "Date" FROM "table_51925" WHERE "Away team" = 'richmond'