CREATE TABLE table_20724 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Ground" CLOB, "Crowd" FLOAT, "Date" CLOB)

Name the date for richmond
SELECT "Date" FROM table_20724 WHERE "Away team" = 'Richmond'
SELECT "Date" FROM "table_20724" WHERE "Away team" = 'Richmond'