Parse this person name:

Mark Martens, 1447-1495, flourished 1471-1490
user
first_name: Mark
last_name: Martens
middle_names: []
temporal:
- start: 1447
  end: 1495
  type: life_span
- start: 1471
  end: 1490
  type: flourished
titles: []
extra_info: []
assistant