The 49ers are heading to the NFC Championship Game for the third time in the last four years.  The Niners knocked off the Dallas Cowboys 19-12 in the NFC Divisional Round of the playoffs in Santa Clara.  Rookie Brock Purdy threw for 214 yards, while Christian McCaffrey ran in for a touchdown for the Niners, who will meet the Philadelphia Eagles in the NFC title game.  Dak Prescott threw for 206 yards, one TD and two interceptions for the Cowboys, who were eliminated by San Francisco for the second straight season.  The teams tied the NFL record with their ninth playoff meeting, with the Niners now 4-and-5 against the rival Cowboys.