Parse this person name:

Denny Sontag, 1934-2009, flourished 1951-1976
user
first_name: Denny
last_name: Sontag
middle_names: []
temporal:
- start: 1934
  end: 2009
  type: life_span
- start: 1951
  end: 1976
  type: flourished
titles: []
extra_info: []
assistant