The Green Monster wall in MLB was constructed as part of Tom Yawkey's major renovation prior to 1934. It was first covered with advertisements which were removed in 1947 due to Batter's Eye. In the same year, it was painted Green to match the rest of the ballpark as suggested by Jean Yawkey. Over the next decade, many pitchers would refer to it as a 'Green Monster'. What is one of the unique features of the Green Monster wall?
1) It is one of the few manually operated scoreboards in MLB.
2) Each tile is hand painted by a local artist.
3) Both Tom and Jean Yawkey are forever remembered on the scoreboard by their initials written in Morse Code.
4) All of the above