Parse this person name:

Mark Stephens (1779-1856, flourished 1808-1828)
user
first_name: Mark
last_name: Stephens
middle_names: []
temporal:
- start: 1779
  end: 1856
  type: life_span
- start: 1808
  end: 1828
  type: flourished
titles: []
extra_info: []
assistant