Parse this person name:

Bryan van Gemert (1219-1274, flourished 1237-1257)
user
first_name: Bryan
last_name: van Gemert
middle_names: []
temporal:
- start: 1219
  end: 1274
  type: life_span
- start: 1237
  end: 1257
  type: flourished
titles: []
extra_info: []
assistant