Parse this person name:

Hellmut Dietz (1749-1797, flourished 1769-1789)
user
first_name: Hellmut
last_name: Dietz
middle_names: []
temporal:
- start: 1749
  end: 1797
  type: life_span
- start: 1769
  end: 1789
  type: flourished
titles: []
extra_info: []
assistant