Parse this person name:

Stephen Chang, 1747-1820, flourished 1767-1777
user
first_name: Stephen
last_name: Chang
middle_names: []
temporal:
- start: 1747
  end: 1820
  type: life_span
- start: 1767
  end: 1777
  type: flourished
titles: []
extra_info: []
assistant