Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Open Domain Question Answering with A Unified Knowledge Interface   The retriever-reader framework is popular for open-domain question answering
(ODQA) due to its ability to use explicit knowledge. Although prior work has
sought to increase the knowledge coverage by incorporating structured knowledge
beyond text, accessing heterogeneous knowledge sources through a unified
interface remains an open question. While data-to-text generation has the
potential to serve as a universal interface for data and text, its feasibility
for downstream tasks remains largely unknown. In this work, we bridge this gap
and use the data-to-text method as a means for encoding structured knowledge
for ODQA. Specifically, we propose a verbalizer-retriever-reader framework for
ODQA over data and text where verbalized tables from Wikipedia and graphs from
Wikidata are used as augmented knowledge sources. We show that our Unified Data
and Text QA, UDT-QA, can effectively benefit from the expanded knowledge index,
leading to large gains over text-only baselines. Notably, our approach sets the
single-model state-of-the-art on Natural Questions. Furthermore, our analyses
indicate that verbalized knowledge is preferred for answer reasoning for both
adapted and hot-swap settings.

22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex