For our AoG-based method, when the inference algorithm only takes the single best state mapping hypothesis into consideration (i.e., k = 1), it yields a very weak performance because the observed state change sequence often cannot be parsed using the learned AoG.
the performance of the AoG-based 5 Because the linguistic labels generated for primitive actions are all from terminal nodes, and the two different AoG learning settings only affect nonterminal nodes.