84500
Famine , along with smaller floods along the lower course of the Yellow River , forced many farmers and former military settlers to seek employment in the south , where large landowners exploited the labour surplus to amass large fortunes .
 location: Yellow River
Given options, please tell me the categories of all the listed entity words.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} 
 Entities: Yellow River 
Answer:
 location: Yellow River