user: Question: How many years was Reasons to be Pretty nominated for best play?
Columns: ['Year', 'Award Ceremony', 'Category', 'Nominee', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [2009.0, 'Tony Award', 'Best Play', 'Neil LaBute', 'Nominated']
SQL:

assistant: SELECT COUNT("Year") FROM "Table" WHERE "Category" = 'best play';