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Founded in the 1820 s as a planned manufacturing center for textiles , Lowell is located along the rapids of the Merrimack River , 25 miles northwest of Boston in what was once the farming community of East Chelmsford , Massachusetts .
 location: Lowell; location: Merrimack River; location: Boston; location: East Chelmsford; location: Massachusetts
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: Lowell, Merrimack River, Boston, East Chelmsford, Massachusetts 
Answer:
 location: Lowell; location: Merrimack River; location: Boston; location: East Chelmsford; location: Massachusetts