  We present an overview of the SciVer shared task, presented at the 2nd
Scholarly Document Processing (SDP) workshop at NAACL 2021. In this shared
task, systems were provided a scientific claim and a corpus of research
abstracts, and asked to identify which articles SUPPORT or REFUTE the claim as
well as provide evidentiary sentences justifying those labels. 11 teams made a
total of 14 submissions to the shared task leaderboard, leading to an
improvement of more than +23 F1 on the primary task evaluation metric. In
addition to surveying the participating systems, we provide several insights
into modeling approaches to support continued progress and future research on
the important and challenging task of scientific claim verification.
