Parse this person name:

Konstantin Ziegert (1319-1375, flourished 1338-1348)
user
first_name: Konstantin
last_name: Ziegert
middle_names: []
temporal:
- start: 1319
  end: 1375
  type: life_span
- start: 1338
  end: 1348
  type: flourished
titles: []
extra_info: []
assistant