Parse this person name:

Herrmann Ortmann (1749-1821, flourished 1769-1789)
user
first_name: Herrmann
last_name: Ortmann
middle_names: []
temporal:
- start: 1749
  end: 1821
  type: life_span
- start: 1769
  end: 1789
  type: flourished
titles: []
extra_info: []
assistant