Parse this person name:

Vigo Welf (1274-1340, flourished 1299-1320)
user
first_name: Vigo
last_name: Welf
middle_names: []
temporal:
- start: 1274
  end: 1340
  type: life_span
- start: 1299
  end: 1320
  type: flourished
titles: []
extra_info: []
assistant