Task: Text Categorization
Input (English): One of these creatures named Sivushko crosses the Black Mire dramatically in the tale of Ilya Muromets. These animals accompanied representations of the Sun, Day, and Night who served Baba Yaga. Hofvarpnir and the seven-headed Uchchaihshravas exemplify these creatures. An immortal talking one, Arion, was born to Demeter after she was raped by Poseidon. Two of these animals sired by the harpy Podarge and Zephyrus, named Balius and Xanthus, were given to Achilles. In the Iliad, a set of these animals belonging to Rhesus is stolen by Odysseus and Diomedes; earlier, in Thrace, four man-eating ones were owned by another Diomedes. A winged one of these animals sprung from Medusa's neck. For 10 points, name these hoofed creatures that include Bellerophon's buddy Pegasus.
Output (English): Social Science