The document describes various characters performing actions such as phoning each other. Britney and Beyoncé phoned Bart. Bart then phoned Homer. Homer finally phoned Britney, while nobody phoned Beyoncé.

1. Britney, Beyoncé, Bart and Homer.

3. Who _______________ ? Britney and Beyoncé did.

4. Who phoned Bart? Britney and Beyoncé did.

5. Who did ___________ ? Bart.

6. Who did Britney and Beyoncé phone? Bart.

7. Who did ___________ ? Homer.

8. Who did Bart phone ? Homer.

9. Who did ___________ ? Britney.

10. Who did Homer phone ? Britney.

11. Who ____ ? Homer did.

12. Who phoned Britney ? Homer did.

13. Who ______________ ? Nobody did.

14. Who phoned Beyoncé ? Nobody did.