Parse this person name:

Mercedes Heintze-Wagenknecht, 1809-1880, flourished 1839-1854
user
first_name: Mercedes
last_name: Heintze-Wagenknecht
middle_names: []
temporal:
- start: 1809
  end: 1880
  type: life_span
- start: 1839
  end: 1854
  type: flourished
titles: []
extra_info: []
assistant