Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Champion | Runner-up | Score | City | Venue |
| --- | --- | --- | --- | --- | --- |
| 1913.0 | (Abandoned) 1 | (Abandoned) 1 | (Abandoned) 1 | (Abandoned) 1 | (Abandoned) 1 |
| 1916.0 | Nacional | Racing | 2-1 | Montevideo | n/e |
| 1917.0 | Racing | Nacional | 2-2 | Montevideo | n/e |
| 1918.0 | Racing | Peñarol | 2-1 | Buenos Aires | n/e |
| 1919.0 | Nacional | Boca Juniors | 3-0 | Montevideo | n/e |
| 1920.0 | Nacional | Boca Juniors | 2-1 | Buenos Aires | n/e |
| 1923.0 | San Lorenzo | Atlético Wanderers | 1-0 | Buenos Aires | n/e |
| 1927.0 | San Lorenzo | Rampla Juniors | 1-0 | Montevideo | n/e |
| 1928.0 | Peñarol | Huracán | 3-0 | Buenos Aires | River Plate |
| 1936.0 | River Plate | Peñarol | 5-1 | Montevideo | Centenario |
| 1937.0 | River Plate | Peñarol | 5-2 | Buenos Aires | San Lorenzo |
| 1938.0 | Independiente | Peñarol | 3-1 | Montevideo | Centenario |
| 1939.0 | Independiente | Nacional | 5-0 | Buenos Aires | San Lorenzo |
| 1940.0 | Nacional | Boca Juniors | 2-2 | Montevideo | Centenario |
| 1941.0 | River Plate | Nacional | 6-1 1-1 | Buenos Aires Montevideo | San Lorenzo Centenario |
| 1942.0 | Nacional | River Plate | 4-0 | Montevideo | Centenario |
| 1945.0 | River Plate | Peñarol | 2-1 3-2 | Montevideo Buenos Aires | Centenario San Lorenzo |
| 1946.0 | Nacional | San Lorenzo | 2-3 7-2 | Buenos Aires Montevideo | Huracán Centenario |
| 1947.0 | River Plate | Nacional | 4-3 3-1 | Montevideo Buenos Aires | Centenario n/e |
| 1955.0 | River Plate | Nacional | 2-1 | Montevideo | Centenario |
Question:
Who was the champion when atlético wanderers was the runner-up?
Answer:
San Lorenzo