Parse this person name:

Mercedes Rensi, 1221-1278, flourished 1237-1247
user
first_name: Mercedes
last_name: Rensi
middle_names: []
temporal:
- start: 1221
  end: 1278
  type: life_span
- start: 1237
  end: 1247
  type: flourished
titles: []
extra_info: []
assistant