Parse this person name:

Joshua Johnston, 1813-1886, flourished 1839-1860
user
first_name: Joshua
last_name: Johnston
middle_names: []
temporal:
- start: 1813
  end: 1886
  type: life_span
- start: 1839
  end: 1860
  type: flourished
titles: []
extra_info: []
assistant