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:
| Celebrity | Famous for | Entered | Exited | Finished |
| --- | --- | --- | --- | --- |
| Kerry Katona | Singer in Atomic Kitten | Day 1 | Day 16 | 1st |
| Jennie Bond | Former royal correspondent for the BBC | Day 1 | Day 16 | 2nd |
| Peter Andre | Pop singer | Day 1 | Day 16 | 3rd |
| Lord Brocket | Aristocrat | Day 1 | Day 15 | 4th |
| Katie Price (first appearance) | Page 3 Model | Day 1 | Day 14 | 5th |
| Alex Best | Second wife of footballer George Best | Day 1 | Day 13 | 6th |
| Neil Ruddock | Ex- footballer | Day 1 | Day 11 | 7th |
| John Lydon | Sex Pistols & Public Image Ltd frontman | Day 1 | Day 11 | 8th |
| Diane Modahl | Athlete | Day 1 | Day 10 | 9th |
| Mike Read | Radio DJ | Day 1 | Day 9 | 10th |
Question:
What day did Alex Best exit?
Answer:
Day 13