Parse this person name:

Ivy Jansen (1228-1274, flourished 1246-1269)
user
first_name: Ivy
last_name: Jansen
middle_names: []
temporal:
- start: 1228
  end: 1274
  type: life_span
- start: 1246
  end: 1269
  type: flourished
titles: []
extra_info: []
assistant