-So for instance, in the example above, the model expects a tensor as input, since it is the input to the module a, and its output will is a table composed of two tensors, corresponding to the outputs of d and e respectively.
+If a node has a single predecessor, the output of the latter is taken
+as-is as the input of the former. If it has multiple predecessors, all
+the outputs are collected into a table, and the table is used as
+input. The indexes of the outputs in that table reflects the order in
+which the edges where created in the DAG:connect() commands.