Parse this person name:

Rius-Juárez, Sigfrido R. (Sigfrido Ramona), 1774-1827
user
first_name: Sigfrido
last_name: Rius-Juárez
middle_names:
- Ramona
temporal:
- start: 1774
  end: 1827
  type: life_span
titles: []
extra_info: []
assistant