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 | type | introduced | fleet size | numbers |
| class 08 | shunter | 1953 | 2 | 08925 , 08934 |
| class 09 | shunter | 1959 | 2 | 09002 , 09009 |
| class 20 | diesel locomotive | 1957 - 1968 | 9 | 20096 , 107 , 142 , 189 , 227 311 , 314 , 901 , 905 |
| class 66 | diesel locomotive | 2002 | 48 | 66701 - 733 , 735 - 751 |
| class 73 | electro - diesel locomotive | 1966 | 10 | 73119 , 141 , 204 - 209 , 212 - 213 |
| class 92 | electric locomotive | 1993 | 7 | 92020 , 021 , 032 , 040 , 044 - 046 |
| vanguard 0 - 6 - 0dh | diesel locomotive | 2011 | 2 | dh50 - 1 , dh50 - 2 |
Title:
gb railfreight
Statement:
diesel locomotive was first introduced 1953 and for the last time 1959
Answer:
refuted