Parse this person name:

Christopher Cross, 1755-1796, flourished 1777-1791
user
first_name: Christopher
last_name: Cross
middle_names: []
temporal:
- start: 1755
  end: 1796
  type: life_span
- start: 1777
  end: 1791
  type: flourished
titles: []
extra_info: []
assistant