Parse this person name:

Dennis Maynard (1949-2009, flourished 1968-1983)
user
first_name: Dennis
last_name: Maynard
middle_names: []
temporal:
- start: 1949
  end: 2009
  type: life_span
- start: 1968
  end: 1983
  type: flourished
titles: []
extra_info: []
assistant