112889
It lies on the left , i.e. northwestern , bank of the river Ahr , roughly 40 " km southwest of Bonn .
 Ahr, Bonn
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Ahr, Bonn