Complex sentence: As proof of the veracity of Elizabeth's message, the Doctor is shown a three-dimensional painting made with Time Lord stasis cubes depicting the fall of Gallifrey's second city, Arcadia.
Split into simpler sentences: As proof of the veracity of Elizabeth's message, the Doctor is shown a three dimensional painting made with Time Lord stasis cubes. The painting depicts the fall of Gallifrey's second city, Arcadia.