knowledge = {
    "person": "A human being. Often detected in street or indoor scenes.",
    "car": "A vehicle used for transportation on roads.",
    "dog": "A domesticated animal commonly kept as a pet.",
    "cat": "A small domesticated carnivorous mammal.",
    "chair": "A piece of furniture used for sitting.",
    "bottle": "A container used to store liquids.",
    "laptop": "A portable personal computer.",
    "tv": "An electronic device used for viewing media.",
    "bus": "A large vehicle used for public transport.",
    "bicycle": "A human-powered vehicle with two wheels."
}