Parse this person name:

Margret Lehmann, 1809-1866, flourished 1839-1861
user
first_name: Margret
last_name: Lehmann
middle_names: []
temporal:
- start: 1809
  end: 1866
  type: life_span
- start: 1839
  end: 1861
  type: flourished
titles: []
extra_info: []
assistant