Parse this person name:

Waldtraut Koch (1785-1857, flourished 1805-1822)
user
first_name: Waldtraut
last_name: Koch
middle_names: []
temporal:
- start: 1785
  end: 1857
  type: life_span
- start: 1805
  end: 1822
  type: flourished
titles: []
extra_info: []
assistant