Parse this person name:

Richard Merle (1406-1468, flourished 1428-1450)
user
first_name: Richard
last_name: Merle
middle_names: []
temporal:
- start: 1406
  end: 1468
  type: life_span
- start: 1428
  end: 1450
  type: flourished
titles: []
extra_info: []
assistant