This is just like sheep, with the special rule below:
For the following nine questions, you must (in any order): 3 of your answers must contain exactly one word
3 of your answers must contain exactly two words
3 of your answers must contain exactly three words
The questions: A world capital
An athletics (track and field) event
A female celebrity
A Premier League club
A Shakespearean tragedy
An HBO series
An Australian tourist attraction
A number
A board game first published after 2000
Note: A word in this case is any consecutive string of characters without a space. So if the question asked for a novel, "Slaughterhouse 5" would be two words and "Slaughterhouse-5" would be one word. These would obviously not be grouped (I would group "Slaughterhouse-five" with the latter though).