Question: What date had a margin victory of 2 strokes?
SQL: SELECT "Date" FROM "2-154097-1" WHERE "Margin of victory" = '2 strokes';

Question: What is the margin of victory in a SemGroup Championship?
SQL: SELECT "Margin of victory" FROM "2-154097-1" WHERE "Tournament" = 'SemGroup Championship';

Question: What was the winning score with a margin victory of 2 strokes?
SQL: SELECT "Winning score" FROM "2-154097-1" WHERE "Margin of victory" = '2 strokes';