Complex sentence: Grand Fenwick is mentioned as having been annexed by Ruritania, an amalgam of the country Ruritania and the machine intelligences of Rossum's Universal Robots (R.U.R.).
Split into simpler sentences: Grand Fenwick is mentioned as having been annexed by Ruritania. Ruritania appears to be an amalgam of the country Ruritania and the machine intelligences of Rossum's Universal Robots (R.U.R.).