Parse this person name:

Janet Margraf (1765-1834, flourished 1792-1805)
user
first_name: Janet
last_name: Margraf
middle_names: []
temporal:
- start: 1765
  end: 1834
  type: life_span
- start: 1792
  end: 1805
  type: flourished
titles: []
extra_info: []
assistant