Parse this person name:

Valentine Bohlander (1797-1877, flourished 1821-1845)
user
first_name: Valentine
last_name: Bohlander
middle_names: []
temporal:
- start: 1797
  end: 1877
  type: life_span
- start: 1821
  end: 1845
  type: flourished
titles: []
extra_info: []
assistant