63261
The reduction in sediment transported down the Mississippi River is the result of engineering modification of the Mississippi , Missouri , and Ohio rivers and their tributaries by dams , meander cutoffs , river-training structures , and bank revetments and soil erosion control programs in the areas drained by them .
 location: Mississippi River; location: Mississippi; location: Missouri; location: Ohio
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Mississippi River, Mississippi, Missouri, Ohio 
Answer:
 location: Mississippi River; location: Mississippi; location: Missouri; location: Ohio