Не работает нейросеть [требует правки]

NeuralNetwork neuralNetwork = new Perceptron(2, 1);
    DataSet trainingSet =
            new DataSet(2, 1);
    trainingSet. addRow (new DataSetRow(new double[]{0, 0},
            new double[]{0}));
    trainingSet. addRow (new DataSetRow (new double[]{0, 1},
            new double[]{1}));
    trainingSet. addRow (new DataSetRow (new double[]{1, 0},
            new double[]{1}));
    trainingSet. addRow (new DataSetRow (new double[]{1, 1},
            new double[]{1}));
    neuralNetwork.learn(trainingSet);
    neuralNetwork.save("on.nnet")

Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory