Parse this person name:

Arnim Eimer (1229-1299, flourished 1255-1268)
user
first_name: Arnim
last_name: Eimer
middle_names: []
temporal:
- start: 1229
  end: 1299
  type: life_span
- start: 1255
  end: 1268
  type: flourished
titles: []
extra_info: []
assistant