user: Question: When was the first performance with a Replacement Cast?
Columns: ['Status', 'Name', 'First Performance', 'Last Performance', 'Style']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Original Cast', 'Sunu Lim 임선우', '10 August 2010', '26 February 2011', 'Ballet']
SQL:

assistant: SELECT "First Performance" FROM "Table" WHERE "Status" = 'Replacement Cast';