I am currently doing a project to detect vehicles using google net, and my google net recognizes a car as a "sports car" however I would want it to be recognize as "Vehicle". How do I achieve that?

clear

camera = webcam; % Connect to the camera net = googlenet; % Load the neural net net.Layers

while true picture = camera.snapshot; % Take a picture sz = net.Layers(1).InputSize ; picture = picture(1:sz(1),1:sz(2),1:sz(3));% Resize the picture

    label = classify(net, picture);        % Classify the picture
    image(picture);     % Show the picture
    title(char(label)); % Show the label
    drawnow;   
end