Parse this person name:

Marta Margraf (1236-1282, flourished 1254-1277)
user
first_name: Marta
last_name: Margraf
middle_names: []
temporal:
- start: 1236
  end: 1282
  type: life_span
- start: 1254
  end: 1277
  type: flourished
titles: []
extra_info: []
assistant