Parse this person name:

Thierry Leclercq (1820-1870, flourished 1850-1865)
user
first_name: Thierry
last_name: Leclercq
middle_names: []
temporal:
- start: 1820
  end: 1870
  type: life_span
- start: 1850
  end: 1865
  type: flourished
titles: []
extra_info: []
assistant