Parse this person name:

Cassandra Silvestri, 1229-1291, flourished 1248-1265
user
first_name: Cassandra
last_name: Silvestri
middle_names: []
temporal:
- start: 1229
  end: 1291
  type: life_span
- start: 1248
  end: 1265
  type: flourished
titles: []
extra_info: []
assistant