51120
In December 1820 , he delivered an enthusiastically-received address commemorating the bicentennial of the landing of the " Mayflower " at Plymouth Rock .
 location: Plymouth Rock
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: Plymouth Rock 
Answer:
 location: Plymouth Rock