Simplify the following text for a Grade 3 native English-speaking person.
Original: Additional persons may be called James Doe , Judy Doe , etc. . However , to avoid possible confusion , if two anonymous or unknown parties are cited in a specific case or action , the surnames Doe and Roe may be used simultaneously ; for example , `` John Doe v. Jane Roe '' .
Simplified: The name `` Jane Doe '' is used for females .