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:
| Class | Railway number(s) | Quantity | Year(s) of manufacture | Axle arrangement |
| --- | --- | --- | --- | --- |
| None | 26–29 ( de ) | 4.0 | 1853 | 2A n2 |
| None | 36–41, 46–49, 60–63 ( de ) | 14.0 | 1855–1863 | 2A n2 |
| P 1 I ( de ) | 88–95, 118–138 | 29.0 | 1870–1874 | 1B n2 |
| P 1 II ( de ) | 154–159 | 6.0 | 1876 | 1B n2 |
| P 1 III ( de ) | 1 (II) …28 (II) , 160–161 | 9.0 | 1880–1884 | 1B n2 |
| P 2 I ( de ) | 26 (II) …63 (II) , 188–193 | 22.0 | 1891–1896 | 1′B1 n2 |
| P 3 I | 93 (II) , 119 (II) , 221–230 | 12.0 | 1898–1904 | 2′B1′ n2i |
| P 3 II ( de ) | 263 | 1.0 | 1900 | 2′(a)B1′n2v |
| P 4 ( de ) | 133 (II) , 286–291, 302–305 | 11.0 | 1905–1906 | 2′B1′ h4v |
| S 3/6 | 341–350 | 10.0 | 1914 | 2′C1′ h4v |
Question:
What is the quantity for railway 263?
Answer:
1.0