Parse this person name:

Roy Morrison, 1831-1877, flourished 1850-1865
user
first_name: Roy
last_name: Morrison
middle_names: []
temporal:
- start: 1831
  end: 1877
  type: life_span
- start: 1850
  end: 1865
  type: flourished
titles: []
extra_info: []
assistant