Parse this person name:

Dietrich Schäfer, 1521-1598, flourished 1539-1559
user
first_name: Dietrich
last_name: Schäfer
middle_names: []
temporal:
- start: 1521
  end: 1598
  type: life_span
- start: 1539
  end: 1559
  type: flourished
titles: []
extra_info: []
assistant