Hmm. Good to know that.
The expression doesn't seem to work, unfortunately. But I appreciate the try.
When you use that string and run the test tool inside Calibre against this book:
L. Frank Baum - [Wizard of Oz 02] - The Marvelous Land of Oz.lit
The following shows in the test results:
Title: L. Frank Baum - [Wizard of Oz 02] - The Marvelous Land of Oz
Authors - nothing
Series - nothing
Series index - nothing