Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?
1. The author of the novel 'Brave New World' is Aldous Huxley. 2. The author of the novel 'An Affair Downstairs' is Sherri Browning. 3. The author of the novel 'Darkness at Noon' is Victor LaValle.