Original sentence: Some well-known and prominent artists and cartoons have joined the campaign, including Russian cartoonist Victor Bogorad.The campaign invites cartoonists from around the world to draw a cartoon in support of Mehdi Rajabian and to picture their time in Evin Prison
Edited sentence: Bogorad is one of the most well-known and pioneers amongst cartoonist.Even though this campaign has only started a month ago, many artists have created and published cartoons in support of the detained musician, Mehdi Rajabian.In this campaign United Sketches invites all cartoonists around the world to each draw a cartoon  in support of Mehdi Rajabian and to picture their time in Evin prison.One of the caricatures that was a hit online, was created by Victor Bogorad 70 year old cartoonist from Russia.Some well-known and prominent artists and cartoons have joined this campaign to support Mehdi