Parse this person name:

Katherine Walker, 1230-1300, flourished 1252-1277
user
first_name: Katherine
last_name: Walker
middle_names: []
temporal:
- start: 1230
  end: 1300
  type: life_span
- start: 1252
  end: 1277
  type: flourished
titles: []
extra_info: []
assistant