Parse this person name:

Marvin Girschner, 1925-1987, flourished 1950-1973
user
first_name: Marvin
last_name: Girschner
middle_names: []
temporal:
- start: 1925
  end: 1987
  type: life_span
- start: 1950
  end: 1973
  type: flourished
titles: []
extra_info: []
assistant