sentences:  The founder of the Han dynasty Liu Bang claimed that he was conceived after his mother dreamt of a dragon.During the Tang dynasty, Emperors wore robes with dragon motif as an imperial symbol, and high officials might also be presented with dragon robes.In the Yuan dynasty, the two-horned five-clawed dragon was designated for use by the Son of Heaven or Emperor only, while the four-clawed dragon was used by the princes and nobles.