Parse this person name:

Reimar I. K. Margaret Köhler, Ilmenau, flourished 1289-1300
user
first_name: Reimar
last_name: Köhler
middle_names:
- I.
- K.
- Margaret
temporal:
- start: 1289
  end: 1300
  type: flourished
titles: []
extra_info:
- Ilmenau
assistant