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:
| Tie no | Home team | Score | Away team | Attendance |
| --- | --- | --- | --- | --- |
| 1 | Chesterfield | 1–0 | Nottingham Forest | 15 February 1997 |
| 2 | Leicester City | 2–2 | Chelsea | 16 February 1997 |
| Replay | Chelsea | 1–0 | Leicester City | 26 February 1997 |
| 3 | Derby County | 3–2 | Coventry City | 26 February 1997 |
| 4 | Manchester City | 0–1 | Middlesbrough | 15 February 1997 |
| 5 | Bradford City | 0–1 | Sheffield Wednesday | 16 February 1997 |
| 6 | Wimbledon | 2–1 | Queens Park Rangers | 15 February 1997 |
| 7 | Leeds United | 2–3 | Portsmouth | 15 February 1997 |
| 8 | Birmingham City | 1–3 | Wrexham | 15 February 1997 |
Question:
what is the difference of points in the game between birmingham city and wrexham?
Answer:
2