Parse this person name:

Mary Johnson, 1842-1906, flourished 1868-1884
user
first_name: Mary
last_name: Johnson
middle_names: []
temporal:
- start: 1842
  end: 1906
  type: life_span
- start: 1868
  end: 1884
  type: flourished
titles: []
extra_info: []
assistant