Parse this person name:

Jeffrey Mercer (1431-1479, flourished 1452-1469)
user
first_name: Jeffrey
last_name: Mercer
middle_names: []
temporal:
- start: 1431
  end: 1479
  type: life_span
- start: 1452
  end: 1469
  type: flourished
titles: []
extra_info: []
assistant