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:
| Date | City | Opponent | Results¹ | Type of game |
| --- | --- | --- | --- | --- |
| May 28 | Belgrade | Denmark | 5:1 | Friendly |
| June 11 | Bern , Switzerland | Switzerland | 4:0 | Friendly |
| June 25 | Belo Horizonte , Brazil | Switzerland | 3:0 | 1950 World Cup |
| June 29 | Porto Alegre , Brazil | Mexico | 4:1 | 1950 World Cup |
| July 1 | Porto Alegre , Brazil | Brazil | 0:2 | 1950 World Cup |
| September 3 | Stockholm , Sweden | Sweden | 2:1 | Friendly |
| September 7 | Helsinki , Finland | Finland | 2:3 | Friendly |
| September 10 | Helsinki , Finland | Denmark | 4:1 | Friendly |
| October 8 | Wien , Austria | Austria | 2:7 | Friendly |
| November 5 | Belgrade | Norway | 4:0 | Friendly |
| November 22 | London, England | England | 2:2 | Friendly |
Question:
What date had an opponent of Sweden and a friendly type game?
Answer:
September 3