1043
About three-fifths of the land area is a gentle plain with a general descent towards the Mississippi River and the Gulf of Mexico .
 location: Mississippi River; location: Gulf of Mexico
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, Gulf of Mexico 
Answer:
 location: Mississippi River; location: Gulf of Mexico