Parse this person name:

Dennis Alexander (1671-1717, flourished 1697-1712)
user
first_name: Dennis
last_name: Alexander
middle_names: []
temporal:
- start: 1671
  end: 1717
  type: life_span
- start: 1697
  end: 1712
  type: flourished
titles: []
extra_info: []
assistant