Complex sentence: It was written by Dan Abnett and features the Eleventh Doctor, together with Amy Pond and Rory Williams, who accidentally find themselves on an Earth-like planet during Winter in the future.
Split into simpler sentences: It was written by Dan Abnett and features the Eleventh Doctor, together with Amy Pond and Rory Williams. The Tardis crew accidentally find themselves on an Earth-like planet during Winter in the future.