Parse this person name:

Karen Pollard (1900-1953, flourished 1918-1946)
user
first_name: Karen
last_name: Pollard
middle_names: []
temporal:
- start: 1900
  end: 1953
  type: life_span
- start: 1918
  end: 1946
  type: flourished
titles: []
extra_info: []
assistant