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:
| Season | Competition | Round | Club | Home | Away | Aggregate |
| --- | --- | --- | --- | --- | --- | --- |
| 2010–11 | UEFA Europa League | Q3 | Motherwell | 1–1 | 0–3 | 1–4 |
| 2011–12 | UEFA Europa League | Q1 | Neath | 4–1 | 2–0 | 6–1 |
| 2011–12 | UEFA Europa League | Q2 | Ferencváros | 3–1(aet) | 1–2 | 4–3 |
| 2011–12 | UEFA Europa League | Q3 | Elfsborg | 4–0 | 1–1 | 5–1 |
| 2011–12 | UEFA Europa League | Play-off | AZ | 2–1 | 0–6 | 2–7 |
| 2012–13 | UEFA Europa League | Q2 | Tirana | 5–0 | 1–1 | 6–1 |
| 2012–13 | UEFA Europa League | Q3 | APOEL | 0–1 | 1–2 | 1–3 |
Question:
what is the number of countries that played during the 2011-12 uefa europa league?
Answer:
4