Simple categories matching nonexistent:

• thing,
• entity,
• facility,

Members with property nonexistent:

• building,
• ideal,
• fictional_character,
• hare_horn,
• phlogiston,
• city,
• qi,
• mathematical_object,
• volume,
• virtual_particle,
• unicorn,
• chimera,
• capital,
• round_square,
• centaur,
• income,
• hair,
• god,
• storage_pool,
• giant,
• proposition,