For an easy real example:
I have two teacher names inside of a column:
Teacher Location
Max|Susan Berlin
Max Berlin
Susan Hamburg
Now in the frontend I built a search&filter. But the teachers of the first line appear as a own teacher "Max|Susan".
But I only want that you can select Max or Susan.
The problem is that we import this with .csv file or google sheets sync.
Is this easy thing not possible with metabox? Or what do I not understand here?