8627
Educated in the capital cities of Luoyang and Chang'an , he achieved success as an astronomer , mathematician , seismologist , hydraulic engineer , inventor , geographer , cartographer , ethnographer , artist , poet , philosopher , politician , and literary scholar .
 location: Luoyang; location: Chang'an
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 location: Luoyang; location: Chang'an