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 4 | London, England | England | 0:2 | Friendly |
| May 8 | Zagreb | Hungary | 2:0 | Friendly |
| June 1 | Belgrade | Bulgaria | 0:2 | Friendly |
| June 23 | Hanover , Germany | West Germany | 0:2 | Friendly |
| June 27 | Malmö , Sweden | Sweden | 1:1 | Friendly |
| September 18 | Belgrade | USSR | 1:2 | Friendly |
| October 12 | Tel Aviv , Israel | Israel | 3:1 | Friendly |
| October 19 | Belgrade | Czechoslovakia | 1:0 | Friendly |
| October 19 | Sofia , Bulgaria | Bulgaria | 1:6 | Friendly |
Question:
Who was the opponent at the game in Belgrade with a 0:2 result?
Answer:
Bulgaria