Parse this person name:

Bertrand Lemonnier (1903-1943, flourished 1918-1936)
user
first_name: Bertrand
last_name: Lemonnier
middle_names: []
temporal:
- start: 1903
  end: 1943
  type: life_span
- start: 1918
  end: 1936
  type: flourished
titles: []
extra_info: []
assistant