142090
During the early days of photography in the 1840s the kirkyard was used by David Octavius Hill and Robert Adamson as a setting for several portraits and tableaux such as The Artist and The Gravedigger .
 David Octavius Hill, Robert Adamson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 David Octavius Hill, Robert Adamson