user: Question: Which nominated work is in the category of Best Performance by a Leading Actress in a Play earlier than 2007?
Columns: ['Year', 'Award', 'Category', 'Nominated Work', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1978.0, 'Tony Award', 'Best Performance by a Featured Actress in a Play', 'Tartuffe', 'Nominated']
SQL:

assistant: SELECT "Nominated Work" FROM "Table" WHERE "Category" = 'Best Performance by a Leading Actress in a Play' AND "Year" < 2007.0;