Respondents also argued that , even if the district court lacked subject matter jurisdiction in regard to the case , it possessed supplemental jurisdiction .
The claims of the authors with unregistered copyrights arose from the same case or argument as those authors holding registered copyrights .
Respondents also argued that , even if the district court lacked subject matter jurisdiction in regard to the case , it possessed supplemental jurisdiction because the claims of the authors with unregistered copyrights arose from the same case or argument as those authors holding registered copyrights .