It's possible that:
* The name is misspelled: Double check the spelling.
* The person is not widely known: It's possible they are a lesser-known actor or filmmaker who hasn't had major roles yet.
* The person is not in the entertainment industry: Maybe the name belongs to someone in a different field.
Can you provide more details about Sirpa Lane, like:
* Nationality
* Date of birth
* Any other information that might help identify them
With more information, I might be able to assist you in finding their projects.