By adding MWE-specific features to the joint model, however, we observe at least a 2.52 / 3.00 point improvement in terms of UAS / LAS regarding the first tokens of MWEs, and a 2.90 / 2.99 point improvement regarding FUM / FTM.
we obtain a 1.35 / 1.28 point improvement with joint(+pred span) compared with the pipeline model in terms of FUM / FTM.