Parse this person name:

Margareta Weller, 1821-1890, flourished 1838-1861
user
first_name: Margareta
last_name: Weller
middle_names: []
temporal:
- start: 1821
  end: 1890
  type: life_span
- start: 1838
  end: 1861
  type: flourished
titles: []
extra_info: []
assistant