Parse this person name:

Erik Walter (1251-1308, flourished 1275-1288)
user
first_name: Erik
last_name: Walter
middle_names: []
temporal:
- start: 1251
  end: 1308
  type: life_span
- start: 1275
  end: 1288
  type: flourished
titles: []
extra_info: []
assistant