Parse this person name:

Senna Kruns (1621-1687, flourished 1651-1679)
user
first_name: Senna
last_name: Kruns
middle_names: []
temporal:
- start: 1621
  end: 1687
  type: life_span
- start: 1651
  end: 1679
  type: flourished
titles: []
extra_info: []
assistant