4606
Construction on what was originally named the George Washington Memorial Parkway on the Maryland side of the Potomac River was underway by 1961 .
 location: George Washington Memorial Parkway; location: Maryland; location: Potomac River
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: George Washington Memorial Parkway, Maryland, Potomac River 
Answer:
 location: George Washington Memorial Parkway; location: Maryland; location: Potomac River