Parse this person name:

John Smith (1812-1866, flourished 1835-1858)
user
first_name: John
last_name: Smith
middle_names: []
temporal:
- start: 1812
  end: 1866
  type: life_span
- start: 1835
  end: 1858
  type: flourished
titles: []
extra_info: []
assistant