Cascaded Grammatical Relation Assignment

TL;DR

This paper presents a cascaded memory-based approach for grammatical relation assignment, where chunking and relation labeling are performed in stages, showing that additional levels improve overall performance.

Contribution

It introduces a multi-level cascaded classifier for grammatical relations, demonstrating that even less accurate chunkers can enhance relation assignment.

Findings

Adding multiple levels improves relation assignment accuracy

Chunking with adverbial function labeling enhances relation detection

Even less performing chunkers contribute positively to the cascade

Abstract

In this paper we discuss cascaded Memory-Based grammatical relations assignment. In the first stages of the cascade, we find chunks of several types (NP,VP,ADJP,ADVP,PP) and label them with their adverbial function (e.g. local, temporal). In the last stage, we assign grammatical relations to pairs of chunks. We studied the effect of adding several levels to this cascaded classifier and we found that even the less performing chunkers enhanced the performance of the relation finder.