Feature films 12 Man-woman relationships 12 Documentary television programs 10 Conservation of natural resources 9 Ecology 9 Recycling (Waste, etc) 9 Renewable energy sources 9 Hogwarts School of Witchcraft and Wizardry (Imaginary organization) 7 Magic 7 Quantum theory 7 Wizards 7 Friendship 6 Film adaptations 4 Motion pictures 4 Pirates 4 Bell's theorem 3 Good and evil 3 History 3 Measurement 3 Potter, Harry (Fictitious character) 3 Revenge 3 Schools 3 Sisters 3 Superconductivity 3 Adventure and adventurers 2 Authoring programs 2 Bridesmaids 2 Comedy films 2 Condensed matter 2 Conduct of life 2