CREATE TABLE table_23731 ("Date" TEXT, "Presenter" TEXT, "Guest 1" TEXT, "Guest 2" TEXT, "Guest 3" TEXT, "Guest 4" TEXT)

Name the guest 2 for colin murray 6 april
SELECT COUNT("Guest 2") FROM table_23731 WHERE "Presenter" = 'Colin Murray' AND "Date" = '6 April'
SELECT COUNT("Guest 2") FROM "table_23731" WHERE "Date" = '6 April' AND "Presenter" = 'Colin Murray'