Parse this person name:

Gretchen Wilmsen, 1824-1874, flourished 1844-1869
user
first_name: Gretchen
last_name: Wilmsen
middle_names: []
temporal:
- start: 1824
  end: 1874
  type: life_span
- start: 1844
  end: 1869
  type: flourished
titles: []
extra_info: []
assistant