text: -- psql ling -af test-sample.sql > test-sample.out
  
  -- query by author name
  SELECT * FROM GetAuthorStats('Austen, Jane');
  
  -- query by subject (tentative way)
  SELECT * FROM Books WHERE title LIKE '%Pride%';
  
  -- query by similar word length
  SELECT * FROM GetBooksOfCloseLength(3300);
  
  -- query by books similar to a book
  SELECT * FROM GetSimilarBooks('Pride and Prejudice');