47535
The district 's boundaries were roughly limited to the area within a few miles of the Tombigbee River and included portions of what is today southern Clarke County , northernmost Mobile County , and most of Washington County .
 Tombigbee River, Clarke County, Mobile County, Washington County
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:
 Tombigbee River, Clarke County, Mobile County, Washington County