CREATE TABLE table_13153 ("Elected" TEXT, "Assembled" TEXT, "Dissolved" TEXT, "1st member" TEXT, "2nd member" TEXT)

Who is the 1st member elected in 1620/21?
SELECT "1st member" FROM table_13153 WHERE "Elected" = '1620/21'
SELECT "1st member" FROM "table_13153" WHERE "Elected" = '1620/21'