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:
| year location | mens singles | womens singles | mens doubles | womens doubles |
| 2011 sheffield | chen qi | ding ning | xu xin zhang jike | guo yue guo yan |
| 2009 sheffield | ma long | guo yan | ma long wang liqin | kim kyung - ah park mi - young |
| 2001 chatham | wang liqin | yoshie takada | timo boll zoltan fejer - konnerth | kim hyang - mi kim hyon - hui |
| 1999 hopton - on - sea | ma wenge | jie schãpp | danny heister trinko keen | lee eun - sil ryu ji - hae |
| 1997 kettering | jean - michel saive | chen - tong fei - ming | patrick chila christophe legout | chai po wa qiao yunping |
Title:
list of ittf pro tour winners
Statement:
in 2011 , north korean competitors swept all four events at the english open
Answer:
refuted