123019
Proposals to eliminate slavery by constitutional amendment were introduced by Representative Arthur Livermore in 1818 and by John Quincy Adams in 1839 , but failed to gain significant traction .
 person: Arthur Livermore; person: John Quincy Adams
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Arthur Livermore, John Quincy Adams 
Answer:
 person: Arthur Livermore; person: John Quincy Adams