Parse this person name:

Nadin Keudel (1783-1850, flourished 1811-1840)
user
first_name: Nadin
last_name: Keudel
middle_names: []
temporal:
- start: 1783
  end: 1850
  type: life_span
- start: 1811
  end: 1840
  type: flourished
titles: []
extra_info: []
assistant