Parse this person name:

Ralph Miller (1251-1314, flourished 1270-1294)
user
first_name: Ralph
last_name: Miller
middle_names: []
temporal:
- start: 1251
  end: 1314
  type: life_span
- start: 1270
  end: 1294
  type: flourished
titles: []
extra_info: []
assistant