Parse this person name:

Mary Walter (1206-1258, flourished 1221-1240)
user
first_name: Mary
last_name: Walter
middle_names: []
temporal:
- start: 1206
  end: 1258
  type: life_span
- start: 1221
  end: 1240
  type: flourished
titles: []
extra_info: []
assistant