Parse this person name:

Friedhelm Margraf, 1265-1307, flourished 1287-1300
user
first_name: Friedhelm
last_name: Margraf
middle_names: []
temporal:
- start: 1265
  end: 1307
  type: life_span
- start: 1287
  end: 1300
  type: flourished
titles: []
extra_info: []
assistant