Parse this person name:

Denis Leduc (1938-1990, flourished 1956-1969)
user
first_name: Denis
last_name: Leduc
middle_names: []
temporal:
- start: 1938
  end: 1990
  type: life_span
- start: 1956
  end: 1969
  type: flourished
titles: []
extra_info: []
assistant