Parse this person name:

Leon Klein (1521-1575, flourished 1549-1569)
user
first_name: Leon
last_name: Klein
middle_names: []
temporal:
- start: 1521
  end: 1575
  type: life_span
- start: 1549
  end: 1569
  type: flourished
titles: []
extra_info: []
assistant