CREATE TABLE table_203_247 (id NUMBER, "district" CLOB, "counties represented" CLOB, "delegate" CLOB, "party" CLOB, "first elected" NUMBER, "committee" CLOB)

how much later as wendell beitzel elected than john donoghue ?
SELECT (SELECT "first elected" FROM table_203_247 WHERE "delegate" = 'wendell r. beitzel') - (SELECT "first elected" FROM table_203_247 WHERE "delegate" = 'john p. donoghue')
SELECT (SELECT "first elected" FROM "table_203_247" WHERE "delegate" = 'wendell r. beitzel') - (SELECT "first elected" FROM "table_203_247" WHERE "delegate" = 'john p. donoghue')