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:
| prr class | builders model | build date | total produced | wheel arrangement | service | power output |
| bs6 | vo - 660 | 1942 - 1945 | 12 | b - b | switcher | nan |
| bs6 | ds - 4 - 4 - 660 | 1942 - 1945 | 99 | b - b | switcher | nan |
| bs7 | ds - 4 - 4 - 750 | 1951 | 24 | b - b | switcher | nan |
| bs7 | s7 | 1951 | 7 | b - b | switcher | nan |
| bs10 | vo | 1943 - 1945 | 8 | b - b | switcher | nan |
| bs10 | ds - 4 - 4 - 1000 | 1948 - 1950 | 137 | b - b | switcher | nan |
| bs12 | s - 12 | 1951 - 1956 | 98 | b - b | switcher | nan |
| bf15 | dr - 4 - 4 - 1500 | 1940 - 1950 | 34 | b - b | freight | nan |
| bf16 | rf - 16 (a) | 1950 - 1952 | 72 | b - b | freight | nan |
| bf16 | rf - 16 (b) | 1950 - 1952 | 30 | b - b | freight | nan |
| bp60a | dr - 12 - 8 - 3000 | 1947 - 1948 | 24 | 2 - d - d - 2 | pass | nan |
| bp20 | dr - 6 - 4 - 2000 | 1948 | 18 | a1a - a1a | pass | nan |
| bp20 | dr - 6 - 4 - 2000 | 1948 | 9 | a1a - a1a | pass | nan |
| brs10 | drs - 4 - 4 - 1000 | 1949 - 1950 | 6 | b - b | pass | nan |
| brs12 | rs - 12 | 1951 - 1954 | 8 | b - b | pass | nan |
| brs15 | drs - 4 - 4 - 1500 | 1950 | 8 | b - b | pass | nan |
| brs16 | as - 16 | 1953 - 1955 | 28 | c - c | pass | nan |
| brs24 | rt - 624 | 1951 - 1954 | 22 | c - c | transfer | nan |
| lrs25 | t2500 | 1950 - 1951 | 22 | c - c | transfer | nan |
Title:
prr locomotive classification
Statement:
the ds - 4 - 4 - 660 model with prr class of bs6 and wheel arrangement of b - b had 99 units total produced
Answer:
supported