Parse this person name:

Leszek Gerlach (1434-1500, flourished 1454-1478)
user
first_name: Leszek
last_name: Gerlach
middle_names: []
temporal:
- start: 1434
  end: 1500
  type: life_span
- start: 1454
  end: 1478
  type: flourished
titles: []
extra_info: []
assistant