Parse this person name:

Helena Mens (1685-1757, flourished 1704-1730)
user
first_name: Helena
last_name: Mens
middle_names: []
temporal:
- start: 1685
  end: 1757
  type: life_span
- start: 1704
  end: 1730
  type: flourished
titles: []
extra_info: []
assistant