Parse this person name:

Walentina Schäfer, 1226-1274, flourished 1241-1255
user
first_name: Walentina
last_name: Schäfer
middle_names: []
temporal:
- start: 1226
  end: 1274
  type: life_span
- start: 1241
  end: 1255
  type: flourished
titles: []
extra_info: []
assistant