% Musicians and instruments
plays(louisArmstrong, trumpet).
plays(jimiHendrix, guitar).
plays(carlosSantana, guitar).
plays(daniele, clarinet).

% Artists and genres
genre(louisArmstrong, jazz).
genre(jimiHendrix, rock).
genre(carlosSantana, rock).
genre(daniele, blues).

% Find all musicians who play the guitar
plays(Who, guitar)
