62774
By 1809 the Little River Turnpike was completed from Alexandria to the Mercer Mill , replacing the older rutted section of Belhaven Road .
 location: Alexandria; person: Mercer
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: Alexandria, Mercer 
Answer:
 location: Alexandria; person: Mercer