CREATE TABLE table_60785 ("Year" FLOAT, "First member" TEXT, "First party" TEXT, "Second member" TEXT, "Second party" TEXT)

Who is the second member more recently than 1790 when John Williams is the first member?
SELECT "Second member" FROM table_60785 WHERE "Year" > '1790' AND "First member" = 'john williams'
SELECT "Second member" FROM "table_60785" WHERE "First member" = 'john williams' AND "Year" > '1790'