Parse this person name:

Bertrand Legendre, 1904-1977, flourished 1919-1935
user
first_name: Bertrand
last_name: Legendre
middle_names: []
temporal:
- start: 1904
  end: 1977
  type: life_span
- start: 1919
  end: 1935
  type: flourished
titles: []
extra_info: []
assistant