Table: choi na - yeon
[['no', 'date', 'tournament', 'winning score', 'to par', 'margin of victory', 'runner (s) - up'], ['1', '20 sep 2009', 'samsung world championship', '71 + 67 + 63 + 71 = 272', '- 16', '1 stroke', 'ai miyazato'], ['2', '1 nov 2009', 'hana bank - kolon championship', '68 + 71 + 67 = 206', '- 10', '1 stroke', 'yani tseng maria hjorth'], ['3', '4 jul 2010', 'jamie farr owens corning classic', '64 + 67 + 68 + 71 = 270', '- 14', 'playoff', 'in - kyung kim christina kim song - hee kim'], ['4', '31 oct 2010', 'lpga hana bank championship', '69 + 68 + 69 = 206', '- 10', '2 strokes', 'vicky hurst'], ['5', '16 oct 2011', 'sime darby lpga malaysia', '66 + 68 + 67 + 68 = 269', '- 15', '1 stroke', 'yani tseng'], ['6', '8 jul 2012', "us women 's open", '71 + 72 + 65 + 73 = 281', '- 7', '4 strokes', 'amy yang']]
Statement: nos 2 and 4 have the lowest Winning Score
Statement: only 1 Tournament has Playoff as the Margin Of Victory
Statement: 3 Tournament have 1 Stroke as the Margin Of Victory
Statement: Samsung World Championship was before the Hana Bank - Kolon Championship