Original sentence: Also used by Ben Hammersley on  Content Syndication with RSS (O'Reilly Media, 2003, ISBN 0-596-00383-8) referring on RSS 0.91, 0.92, and 2.0 (Ch.It ’s so simple to be happy, but so difficult to be simple
Edited sentence: It ’s so simple to be happy, but so difficult to be simple  Also used by Ben Hammersley on  Content Syndication with RSS (O'Reilly Media, 2003, ISBN 0-596-00383-8) referring on RSS 0.91, 0.92, and 2.0 (Ch