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 |
| --- | --- | --- | --- | --- |
| February 26 | Split | Sweden | 2:1 | Friendly |
| April 30 | Barcelona , Spain | Spain | 1:2 | 1970 WCQ |
| June 4 | Helsinki , Finland | Finland | 5:1 | 1970 WCQ |
| September 3 | Belgrade | Romania | 1:1 | Friendly |
| September 24 | Belgrade | USSR | 1:3 | Friendly |
| October 19 | Skoplje | Belgium | 4:0 | 1970 WCQ |
Question:
On what Date were the Results¹ 5:1?
Answer:
June 4