Table:
text: Mi-Hyun Kim
LPGA Tour (8)
LPGA Tour (8)
Date_ Tournament Winning_score Margin_of_victory Runners_up
16 Jul 2006 Jamie Farr Owens Corning Classic -18 (68-66-67-65=266) Playoff Natalie Gulbis
6 May 2007 SemGroup Championship -3 (71-68-71=210) Playoff Juli Inkster

Question: What is the margin of victory in a semgroup championship for Mi-Hyun Kim?