Q: is the subject real? (not imaginary)
    YQ: is the subject a US President?
        YG: Abraham Lincoln?
        NQ: is the subject a revolutionary war figure?
            YG: Alexander Hamilton?
            NG: Martin Luther King, Jr?
    NQ: is the subject a Star Wars Character?
        YG: Darth Vader?
        NQ: is the subject a character from Lord of the Rings?
            YG: Frodo Baggins?
            NG: Captain Kirk?