Parse this person name:

Constantin Caspar (1249-1319, flourished 1277-1295)
user
first_name: Constantin
last_name: Caspar
middle_names: []
temporal:
- start: 1249
  end: 1319
  type: life_span
- start: 1277
  end: 1295
  type: flourished
titles: []
extra_info: []
assistant