What are the affiliations of the author "Mark A. Musen" written on and off paper?
Mark A. Musen refer to Author.Name;
SELECT T1.Affiliation FROM PaperAuthor AS T1 INNER JOIN Author AS T2 ON T1.AuthorId = T2.Id WHERE T2.Name = 'Mark A. Musen'
database name:db_id authors
Author table Author Cols: Id dtype integer, Name dtype text, Affiliation dtype text, 
Conference table Conference Cols: Id dtype integer, ShortName dtype text, FullName dtype text, HomePage dtype text, 
Journal table Journal Cols: Id dtype integer, ShortName dtype text, FullName dtype text, HomePage dtype text, 
Paper table Paper Cols: Id dtype integer, Title dtype text, Year dtype integer, ConferenceId dtype integer, JournalId dtype integer, Keyword dtype text, 
PaperAuthor table PaperAuthor Cols: PaperId dtype integer, AuthorId dtype integer, Name dtype text, Affiliation dtype text, 
