Parse this person name:

Diethard Koch II (1220-1276, flourished 1239-1251)
user
first_name: Diethard
last_name: Koch II
middle_names: []
temporal:
- start: 1220
  end: 1276
  type: life_span
- start: 1239
  end: 1251
  type: flourished
titles: []
extra_info: []
assistant