Parse this person name:

Valerij Hoffmann, 1381-1426, flourished 1407-1421
user
first_name: Valerij
last_name: Hoffmann
middle_names: []
temporal:
- start: 1381
  end: 1426
  type: life_span
- start: 1407
  end: 1421
  type: flourished
titles: []
extra_info: []
assistant