Parse this person name:

Naud Geerts (1811-1855, flourished 1838-1850)
user
first_name: Naud
last_name: Geerts
middle_names: []
temporal:
- start: 1811
  end: 1855
  type: life_span
- start: 1838
  end: 1850
  type: flourished
titles: []
extra_info: []
assistant