arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.09296cs.AIcs.CL
收藏

AMUSE:面向关联数据问答的多语言语义解析

AMUSE: Multilingual Semantic Parsing for Question Answering over Linked Data

Bielefeld University(比勒费尔德大学)

Sherzod Hakimov, Soufian Jebbara, Philipp Cimiano

摘要:

在RDF数据上回答自然语言问题的任务近年来受到了广泛的关注,特别是在一系列QALD基准的背景下。该任务包括将自然语言问题映射到可执行形式,例如SPARQL,以便可以从给定的KB中提取答案。到目前为止,提出的大多数系统都是i)单语的,ii)依赖于一组硬编码的规则来解释问题并将其映射到SPARQL查询中。我们提出了第一个多语言QALD管道,该管道从训练数据中导出一个模型,用于将自然语言问题映射为逻辑形式作为概率推理。特别是,我们的方法学会了映射通用的句法依赖表示的语言独立的逻辑形式的基础上DUDES(依赖性为基础的未充分指定的话语表示结构),然后映射到SPARQL查询作为确定性的第二步。我们的模型建立在依赖于从依赖图和相应的语义表示中提取的特征的因子图上。我们依靠近似推理技术,特别是马尔可夫链蒙特卡罗方法,以及样本排名使用排名目标更新参数。我们的重点在于开发的方法,克服词汇差距,并提出了一种新的组合机器翻译和词嵌入的方法,为此目的。作为我们方法的概念证明,我们在英语,德语和西班牙语的QALD-6数据集上评估了我们的方法。

英文摘要:

The task of answering natural language questions over RDF data has received wide interest in recent years, in particular in the context of the series of QALD benchmarks. The task consists of mapping a natural language question to an executable form, e.g. SPARQL, so that answers from a given KB can be extracted. So far, most systems proposed are i) monolingual and ii) rely on a set of hard-coded rules to interpret questions and map them into a SPARQL query. We present the first multilingual QALD pipeline that induces a model from training data for mapping a natural language question into logical form as probabilistic inference. In particular, our approach learns to map universal syntactic dependency representations to a language-independent logical form based on DUDES (Dependency-based Underspecified Discourse Representation Structures) that are then mapped to a SPARQL query as a deterministic second step. Our model builds on factor graphs that rely on features extracted from the dependency graph and corresponding semantic representations. We rely on approximate inference techniques, Markov Chain Monte Carlo methods in particular, as well as Sample Rank to update parameters using a ranking objective. Our focus lies on developing methods that overcome the lexical gap and present a novel combination of machine translation and word embedding approaches for this purpose. As a proof of concept for our approach, we evaluate our approach on the QALD-6 datasets for English, German & Spanish.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑