CREATE TABLE table_61961 ("President" TEXT, "Treasurer" TEXT, "Secretary" TEXT, "Social AO" TEXT, "Academic AO" TEXT, "Internal CO" TEXT, "External CO" TEXT)

What Social AO has a President of harm van leeuwen?
SELECT "Social AO" FROM table_61961 WHERE "President" = 'harm van leeuwen'
SELECT "Social AO" FROM "table_61961" WHERE "President" = 'harm van leeuwen'