Parse this person name:

Arnim Ernst, 1687-1767, flourished 1705-1734
user
first_name: Arnim
last_name: Ernst
middle_names: []
temporal:
- start: 1687
  end: 1767
  type: life_span
- start: 1705
  end: 1734
  type: flourished
titles: []
extra_info: []
assistant