Original sentence: " The oppositions and reformists' websites are in some cases blocked and some are down.One day after elections, 13 June 2009, when thousands of opposition supporters have clashed with police it is filtered again
Edited sentence: " Besides, many of the oppositions and reformists' websites are blocked and some are down, which is suspected by many to be because of government's attacks on the websites.One day after elections, 13 June 2009, when thousands of opposition supporters have clashed with police and Facebook is almost the last hope for people to share the news, it is filtered again.These people are mad at the results of the elections, which they say has been a complete fraud