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:
| No. in set | No. in series | Title | Directed by | Written by | Original air date | Production code |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | 174.0 | " Per Manum " | Kim Manners | Chris Carter & Frank Spotnitz | February18,2001 | 8ABX13 |
| 2.0 | 175.0 | " This is Not Happening " | Kim Manners | Chris Carter & Frank Spotnitz | February25,2001 | 8ABX14 |
| 3.0 | 176.0 | " Deadalive " | Tony Wharmby | Chris Carter & Frank Spotnitz | April1,2001 | 8ABX15 |
| 4.0 | 177.0 | " Three Words " | Tony Wharmby | Chris Carter & Frank Spotnitz | April8,2001 | 8ABX16 |
| 5.0 | 179.0 | " Vienen " | Rod Hardy | Steven Maeda | April29,2001 | 8ABX18 |
| 6.0 | 181.0 | " Essence " | Kim Manners | Chris Carter | May13,2001 | 8ABX20 |
| 7.0 | 182.0 | " Existence " | Kim Manners | Chris Carter | May20,2001 | 8ABX21 |
| 8.0 | 183.0 | " Nothing Important Happened Today " | Kim Manners | Chris Carter & Frank Spotnitz | November11,2001 | 9ABX01 |
| 9.0 | 184.0 | " Nothing Important Happened Today II " | Tony Wharmby | Chris Carter & Frank Spotnitz | November18,2001 | 9ABX02 |
| 10.0 | 188.0 | " Trust No 1 " | Tony Wharmby | Chris Carter & Frank Spotnitz | January6,2002 | 9ABX06 |
| 11.0 | 191.0 | " Provenance " | Kim Manners | Chris Carter & Frank Spotnitz | March3,2002 | 9ABX09 |
| 12.0 | 192.0 | " Providence " | Chris Carter | Chris Carter & Frank Spotnitz | March10,2002 | 9ABX10 |
Question:
What is the episode number that has production code 8abx15?
Answer:
176.0