Parse this person name:

Anthony Siering, 1351-1421, flourished 1373-1386
user
first_name: Anthony
last_name: Siering
middle_names: []
temporal:
- start: 1351
  end: 1421
  type: life_span
- start: 1373
  end: 1386
  type: flourished
titles: []
extra_info: []
assistant