A related business object can hold one instance or many. A worker's manager is a single relationship. A worker's time-off requests form a collection. A filter on the worker decides which workers appear; a subfilter tests or restricts the related instances attached to each worker.
Choose the quantifier deliberately. Some means at least one related row matches, every means all related rows match, and none means no related row matches. A worker with no requests needs special attention because a rule about all requests can be true for an empty collection. These tasks use some and none to make the intended population explicit. Keep the parent worker's ID in the output so related-row behavior can be traced.