Joint learning improves semantic role labeling
Kristina Toutanovaa b, Aria Haghighia b, Christopher D. Manninga b
- aStanford University, Stanford, CA
- bStanford University Stanford CA
Papers open inside SciRah from the original publisher or repository; SciRah never hosts them.
Abstract
Despite much recent progress on accurate semantic role labeling, previous work has largely used independent classifiers, possibly combined with separate label sequence models via Viterbi decoding. This stands in stark contrast to the linguistic observation that a core argument frame is a joint structure, with strong dependencies between arguments. We show how to build a joint model of argument frames, incorporating novel features that model these interactions into discriminative log-linear models. This system achieves an error reduction of 22% on all arguments and 32% on core arguments over a state-of-the art independent classifier for gold-standard parse trees on PropBank.
TL;DRThis work shows how to build a joint model of argument frames, incorporating novel features that model these interactions into discriminative log-linear models, achieving error reduction of 22% on all arguments and 32% on core arguments over a state-of-the art independent classifier for gold-standard parse trees on PropBank. (Semantic Scholar)