Parse this person name:

Meinhard Ortmann-Graf, 1511-1590, flourished 1540-1556
user
first_name: Meinhard
last_name: Ortmann-Graf
middle_names: []
temporal:
- start: 1511
  end: 1590
  type: life_span
- start: 1540
  end: 1556
  type: flourished
titles: []
extra_info: []
assistant