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:
| episode | broadcast date | run time | viewers (in millions) | archive |
| episode one | 2 november 1968 | 24:32 | 7.3 | only stills and / or fragments exist |
| episode two | 9 november 1968 | 24:26 | 7.1 | 16 mm t / r |
| episode three | 16 november 1968 | 23:44 | 7.1 | 16 mm t / r |
| episode four | 23 november 1968 | 24:18 | 6.4 | only stills and / or fragments exist |
| episode five | 30 november 1968 | 23:25 | 6.7 | 16 mm t / r |
| episode six | 7 december 1968 | 23:20 | 6.5 | 16 mm t / r |
| episode seven | 14 december 1968 | 24:46 | 7.2 | 16 mm t / r |
| episode eight | 21 december 1968 | 25:03 | 7.0 | 16 mm t / r |
Title:
none
Statement:
episode four had a run time of 24:18
Answer:
supported