Parse this person name:

Brian Clark, 1210-1261, flourished 1237-1255
user
first_name: Brian
last_name: Clark
middle_names: []
temporal:
- start: 1210
  end: 1261
  type: life_span
- start: 1237
  end: 1255
  type: flourished
titles: []
extra_info: []
assistant