Record labels usually have a team of people responsible for artists and repertoire (A&R) support; often times these credits end up on releases. Currently we have only a relationship linking said individuals to release groups (though IMO this might be better suited for releases; that's another ticket) but no relationship to link A&R people to the labels on whose behalf they work(ed).
Example: Mariko Kimura has/had an artists & repertoire position at SME Records