Parse this person name:

Emir Niermann (1399-1450, flourished 1420-1438)
user
first_name: Emir
last_name: Niermann
middle_names: []
temporal:
- start: 1399
  end: 1450
  type: life_span
- start: 1420
  end: 1438
  type: flourished
titles: []
extra_info: []
assistant