Parse this person name:

Mareen Benthin (1812-1854, flourished 1831-1843)
user
first_name: Mareen
last_name: Benthin
middle_names: []
temporal:
- start: 1812
  end: 1854
  type: life_span
- start: 1831
  end: 1843
  type: flourished
titles: []
extra_info: []
assistant