Table:
text: Eagles–Giants rivalry
1950s (Giants 13-7)
1950s (Giants 13-7)
Year_ Date_ Winner Result_ Loser Location_
1950 November 26 New York Giants 7-3 Philadelphia Eagles Polo Grounds
1950 December 10 New York Giants 9-7 Philadelphia Eagles Connie Mack Stadium
1951 October 21 New York Giants 26-24 Philadelphia Eagles Polo Grounds
1951 December 9 New York Giants 23-7 Philadelphia Eagles Connie Mack Stadium
1952 October 4 New York Giants 31-7 Philadelphia Eagles Connie Mack Stadium
1952 October 26 Philadelphia Eagles 14-10 New York Giants Polo Grounds
1953 November 8 Philadelphia Eagles 30-7 New York Giants Connie Mack Stadium
1953 November 29 New York Giants 37-28 Philadelphia Eagles Polo Grounds

text: Eagles–Giants rivalry
1950s (Giants 13-7)
1950s (Giants 13-7)
Year_ Date_ Winner Result_ Loser Location_
1954 November 14 New York Giants 27-14 Philadelphia Eagles Polo Grounds
1954 December 12 Philadelphia Eagles 29-14 New York Giants Connie Mack Stadium
1955 September 24 Philadelphia Eagles 27-17 New York Giants Connie Mack Stadium
1955 November 20 New York Giants 31-7 Philadelphia Eagles Polo Grounds
1956 October 28 New York Giants 20-3 Philadelphia Eagles Yankee Stadium
1956 December 15 Philadelphia Eagles 21-7 New York Giants Connie Mack Stadium
1957 October 5 New York Giants 24-20 Philadelphia Eagles Connie Mack Stadium
1957 November 17 New York Giants 13-0 Philadelphia Eagles Yankee Stadium
1958 October 5 Philadelphia Eagles 27-24 New York Giants Franklin Field

Question: Who was the pre-1956 winning team on October 21 under the Eagles-Giants rivalry in the 1950s (Giants 13-7)?