Parse this person name:

Leon Janse (1393-1461, flourished 1419-1446)
user
first_name: Leon
last_name: Janse
middle_names: []
temporal:
- start: 1393
  end: 1461
  type: life_span
- start: 1419
  end: 1446
  type: flourished
titles: []
extra_info: []
assistant