Fig. 3
From: Constructing phylogenetic networks via cherry picking and machine learning
The ON reconstructed from the sequence \(S = (x, y), (x, w), (w, y)\). The pairs are added to the network in reverse order: if the first element of a pair is not yet in the network, it is added as a cherry with the second element (see the pair (x, w)). Otherwise, a reticulation is added above the first element with an incoming edge from a new parent of the second element (see the pair (x, y))