Parse this person name:

Sylvia Heß (1938-1987, flourished 1955-1979)
user
first_name: Sylvia
last_name: Heß
middle_names: []
temporal:
- start: 1938
  end: 1987
  type: life_span
- start: 1955
  end: 1979
  type: flourished
titles: []
extra_info: []
assistant