AMR Parsing as Sequence-to-Graph Transduction
Table 5: Smatch scores of full models trained and tested based on different node linearization strategies.
['Node Linearization', 'AMR 1.0', 'AMR 2.0']
Alignments are created using the tool by Pourdamghani et al. Clearly, our linearization strategy leads to much better results than the two alternates. We also tried other traversal strategies such as combining in-order traversal with alphanumerical sorting or alignment-based sorting, but did not get scores even comparable to the two alternates.