user: Question: What tournament did Tiger hold a 2 shot lead after 54 holes?
Columns: ['Year', 'Championship', '54 holes', 'Winning score', 'Margin of victory', 'Runner(s)-up']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1999.0, 'WGC-NEC Invitational', '5 shot lead', '–10 (66-71-62-71=270)', '1 stroke', 'Phil Mickelson']
SQL:

assistant: SELECT "Championship" FROM "Table" WHERE "54 holes" = '2 shot lead';