Task: Text Categorization
Input (English): During the decline of this empire, King Hyspaosines broke away to found a small kingdom called Characene, and at the age of eighty, Sanatruces was made king of this empire by the Sacaraucae Scythians. The city of Nisa served as the burial ground of this empire's kings, who were descended from the Parni people. This empire agreed to open the Silk Road with their Chinese contemporaries, the Han, under King Mithridates II. Tigranes the Great took advantage of this empire's weakness to expand his own lands, and at the Battle of Golpayegan this empire's last ruler, Artabanus IV, was killed by the forces of Ardashir I. This empire's all cavalry army annihilated a Roman force at the Battle of Carrhae and killed Crassus, and earlier its founder, Arsaces, had proclaimed their independence from the Seleucids. For 10 points, name this Persian empire which often fought Rome and was defeated and succeeded by the Sassanids.
Output (English): History