I'm very new to dl4j and I'm struggling to preform basic operations within a graph. As an example how would I preform a multiplication of the output of 2 layers. For example in the code below what should the ??? be substituted with? Given that I want to matrix multiply document_output and question_output.
builder.addLayer(document_output,
RnnProvider().makeLaterLayer(), second_layer_document_rnn)
builder.addLayer(question_output,
RnnProvider().makeLaterLayer(), second_layer_question_rnn)
builder.addVertex(attention,
???,
document_output, question_output
)
builder.setOutputs(attention)