Parse this person name:

Polina Koch (1673-1739, flourished 1703-1723)
user
first_name: Polina
last_name: Koch
middle_names: []
temporal:
- start: 1673
  end: 1739
  type: life_span
- start: 1703
  end: 1723
  type: flourished
titles: []
extra_info: []
assistant