Parse this person name:

Greca Veltroni (1849-1899, flourished 1868-1884)
user
first_name: Greca
last_name: Veltroni
middle_names: []
temporal:
- start: 1849
  end: 1899
  type: life_span
- start: 1868
  end: 1884
  type: flourished
titles: []
extra_info: []
assistant