Parse this person name:

Che Gras (1740-1806, flourished 1768-1789)
user
first_name: Che
last_name: Gras
middle_names: []
temporal:
- start: 1740
  end: 1806
  type: life_span
- start: 1768
  end: 1789
  type: flourished
titles: []
extra_info: []
assistant