Parse this person name:

Stan Martens, 1250-1309, flourished 1277-1304
user
first_name: Stan
last_name: Martens
middle_names: []
temporal:
- start: 1250
  end: 1309
  type: life_span
- start: 1277
  end: 1304
  type: flourished
titles: []
extra_info: []
assistant