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:
| major version | minor version | webkit version | operating system | release date | features |
| safari 3 | 3.1.1 | 525.17 | windows xp , vista | april 16 , 2008 | improved stability and added security updates |
| safari 3 | 3.1.2 | 525.21 | windows xp , vista | june 19 , 2008 | improved stability and added security updates |
| safari 3 | 3.2.1 | 525.27.1 | windows xp , vista | november 24 , 2008 | stability improvements |
| safari 3 | 3.2.2 | 525.28.1 | windows xp , vista | february 12 , 2009 | security updates |
| safari 3 | 3.2.3 | 525.29.1 | windows xp , vista | may 12 , 2009 | security updates |
| safari 4 | 4.0 | 528.17 | windows xp , vista | may 12 , 2009 | public beta latest security updates |
| safari 5 | 5.0.5 | 533.21.1 | windows xp , vista , 7 | april 14 , 2011 | security update |
Title:
safari version history
Statement:
the major version of safari 4 had a webkit version of 528.17
Answer:
supported