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:
| source | date | clinton | obama | undecided |
| surveyusa | may 16 - may 18 , 2008 | 42% | 55% | 1% |
| suffolk | may 15 - may 17 , 2008 | 41% | 45% | 8% |
| american research group | may 14 - may 15 , 2008 | 45% | 50% | 5% |
| public policy polling (d) | may 10 - may 11 , 2008 | 39% | 53% | 7% |
| surveyusa | may 9 - may 11 , 2008 | 43% | 54% | 2% |
| davis , hibbitts & midghall | may 8 - may 10 , 2008 | 35% | 55% | 10% |
| rasmussen reports | may 1 , 2008 | 39% | 51% | 10% |
| surveyusa | april 28 - april 30 , 2008 | 44% | 50% | 4% |
| surveyusa | april 4 - april 6 , 2008 | 42% | 52% | 3% |
| riley research poll | january 21 - january 29 , 2008 | 36% | 28% | 13% |
Title:
none
Statement:
surveyusa date may16 - may 18 , 2008 states that clinton has 10% greater than obama
Answer:
refuted