Parse this person name:

Heather Graham, 1554-1631, flourished 1580-1590
user
first_name: Heather
last_name: Graham
middle_names: []
temporal:
- start: 1554
  end: 1631
  type: life_span
- start: 1580
  end: 1590
  type: flourished
titles: []
extra_info: []
assistant