Parse this person name:

Walter Mcdonald (1216-1265, flourished 1233-1259)
user
first_name: Walter
last_name: Mcdonald
middle_names: []
temporal:
- start: 1216
  end: 1265
  type: life_span
- start: 1233
  end: 1259
  type: flourished
titles: []
extra_info: []
assistant