Parse this person name:

Marcella Ritter-Schwital (1926-1972, flourished 1941-1957)
user
first_name: Marcella
last_name: Ritter-Schwital
middle_names: []
temporal:
- start: 1926
  end: 1972
  type: life_span
- start: 1941
  end: 1957
  type: flourished
titles: []
extra_info: []
assistant