Parse this person name:

Steven Martin (1821-1864, flourished 1842-1859)
user
first_name: Steven
last_name: Martin
middle_names: []
temporal:
- start: 1821
  end: 1864
  type: life_span
- start: 1842
  end: 1859
  type: flourished
titles: []
extra_info: []
assistant