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Exception in thread "main" java.lang.ExceptionInInitializerError
	at org.deeplearning4j.nn.conf.NeuralNetConfiguration$Builder.seed(NeuralNetConfiguration.java:671)
	at Trainer.TrainerImpl.main(TrainerImpl.java:54)
Caused by: java.lang.RuntimeException: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html
	at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5768)
	at org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:202)
	... 2 more
Caused by: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html
	at org.nd4j.linalg.factory.Nd4jBackend.load(Nd4jBackend.java:213)
	at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5765)