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:
| Round | Opposition | First leg | Second leg | Aggregate score |
| --- | --- | --- | --- | --- |
| 1st | Hibernian | 0–1 (a) | 3–1 (h) | 3–2 |
| 2nd | Real Sociedad | 3–1 (a) | 6–0 (h) | 9–1 |
| 3rd | Śląsk Wrocław | 2–1 (a) | 3–0 (h) | 5–1 |
| Quarter-final | Dynamo Dresden | 0–0 (a) | 2–1 (h) | 2–1 |
| Semi-final | Barcelona | 1–0 (a) | 1–1 (h) | 2–1 |
Question:
What was the first leg of the semi-final?
Answer:
1–0 (a)