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 | Type |
| --- | --- | --- | --- | --- |
| B(Krauss) ( de ) | 172–177 | 6.0 | 1867–1868 | B n2t |
| T 3 | 885–994 | 110.0 | 1891–1913 | C n2t |
| T 3 | 996–999 | 4.0 | 1894–1896 | C n2t |
| T ( de ) | 1001–1010 | 10.0 | 1896–1904 | B n2t |
| T 9 ( de ) | 1101–1110 | 10.0 | 1906–1907 | 1′C n2t |
| T 4 | 851–858 | 8.0 | 1906–1909 | D n2t |
| T 5 | 1201–1296 | 96.0 | 1910–1917 | 1′C1′ h2t |
| T 6 | 1401–1412 | 12.0 | 1916–1918 | D h2t |
| T 18 | 1121–1140 | 20.0 | 1919 | 2′C2′ h2t |
| T 14 | 1441–1460, 1461–1479 | 39.0 | 1921–1922 | 1′D1′ h2t |
| Tn ( de ) | 1001–1030 | 30.0 | 1921–1922 | E h2t |
| Tk ( de ) | 1–2 | 2.0 | 1876 | B1 n2t |
| Tu ( de ) | 1–2 | 2.0 | 1873 | B n2t |
| KL ( de ) | 1–2 | 2.0 | 1908 | B h2t |
Question:
Which Year(s) of manufacture has a Quantity of 2, and a Type of b n2t?
Answer:
1873.0