Give you a statement and table with its title in Markdown format, please determine whether the statement is supported or refuted by, or is unrelated to the table. It'a binary classification problem, you should choose the answer between supported and refuted. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| class | firebox | cylinder size | valves | valve gear | number built | years built |
| e2 | radial - stay | 20 ½ x 26 | slide | stephenson | 88 | 1901 - 02 |
| e2a | belpaire | 20 ½ x 26 | slide | stephenson | 93 | 1902 - 05 |
| e2b | belpaire | 20 ½ x 26 | piston | stephenson | 70 | 1903 - 04 |
| e2c | belpaire | 20 ½ x 26 | slide | stephenson | 22 | 1903 |
| e2d | belpaire | 20 ½ x 26 | piston | walschaerts | 32 | 1906 - 08 |
| e3 | radial - stay | 22 x 26 | slide | stephenson | 8 | 1901 - 02 |
| e3a | belpaire | 22 x 26 | slide | stephenson | 114 | 1903 - 05 |
| e3d | belpaire | 22 x 26 | piston | walschaerts | 56 | 1906 - 10 |
| e7s | belpaire | 22 ½ x 26 | piston | stephenson | 90 conv fr e2a , b , c | 1916 - 20 |
Title:
none
Statement:
the valves for the e7s class , belpaire firebox is slide , not piston
Answer:
refuted