Parse this person name:

Russell Christian, 1239-1304, flourished 1255-1265
user
first_name: Russell
last_name: Christian
middle_names: []
temporal:
- start: 1239
  end: 1304
  type: life_span
- start: 1255
  end: 1265
  type: flourished
titles: []
extra_info: []
assistant