CREATE TABLE table_61936 ("Summoned" CLOB, "Elected" CLOB, "Assembled" CLOB, "Dissolved" CLOB, "1st member" CLOB, "2nd member" CLOB)

What is the dissolved date of the parliament assembled on 4 November 1461 with an unknown 2nd member?
SELECT "Dissolved" FROM table_61936 WHERE "2nd member" = 'unknown' AND "Assembled" = '4 november 1461'
SELECT "Dissolved" FROM "table_61936" WHERE "2nd member" = 'unknown' AND "Assembled" = '4 november 1461'