Parse this person name:

Roy Krein (1395-1442, flourished 1411-1426)
user
first_name: Roy
last_name: Krein
middle_names: []
temporal:
- start: 1395
  end: 1442
  type: life_span
- start: 1411
  end: 1426
  type: flourished
titles: []
extra_info: []
assistant