Complex sentence: In June 2012, Kara Swisher reported that Crowd Fusion was acquiring London-based company Ceros, which had recently been split off from Group FMG, a marketing-services company based in London and New York.
Split into simpler sentences: In June 2012, Kara Swisher reported that Crowd Fusion was acquiring London-based Ceros. Ceros was spun out of Group FMG, a marketing-services company based in London and New York.