Complex sentence: By 2008, he met Tarek Mandour (the businessman) which he agreed to financially produce it as a youth project as well as supporting the music scene, but because of the Egyptian Revolution in 2011 the magazine went down again.
Split into simpler sentences: By 2008, he met Tarek Mandour (businessman) which he agreed to financially produce it as a youth project as well as supporting the music scene. Because of the Egyptian Revolution in 2011 the magazine went down again.