Parse this person name:

Sager'Schäfer, Renata S. (Renata Sven), died 1770
user
first_name: Renata
last_name: Sager'Schäfer
middle_names:
- Sven
temporal:
- start: null
  end: 1770
  type: life_span
titles: []
extra_info: []
assistant