Parse this person name:

Mercader Vargas, Demetrio Adolfo Pánfilo, 1368-1399
user
first_name: Demetrio
last_name: Mercader Vargas
middle_names:
- Adolfo
- Pánfilo
temporal:
- start: 1368
  end: 1399
  type: life_span
titles: []
extra_info: []
assistant