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This index is derived from text extracted from third-party web pages, including news articles. It is released for research on evidence retrieval for fact-checking. By requesting access you agree to use it for research purposes, to respect the rights of the original publishers, and not to redistribute the extracted text.
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AVeriTeC repaired dev, SPLADE index
A prebuilt SPLADE index over Factiverse/averitec-repaired-dev, so the corpus can be searched without a GPU.
Encoder: naver/splade-cocondenser-ensembledistil, the model the
AVeriTeC shared task used, so scores are comparable with its baselines.
Two differences from the shipped store
It indexes the repaired text, in which 63.9% of the empty documents have been recovered (21.5% of documents empty, down to 7.8%).
It does not drop text. The shared task's builder flushes its buffer before appending the current sentence and never flushes after the loop, so every document loses its final sentence and a single-sentence document yields one empty chunk and no text. This index chunks at 600 words instead, losing nothing. Chunk size was chosen from a sweep over 59 claims where 600 and 300 words gave identical gold recall — paired difference 0.0000, 3 wins, 3 losses, 53 ties — at half the chunks.
Layout
dev/full/<claim_id>/documents.pkl chunks, with url metadata
dev/full/<claim_id>/embeddings.npz scipy CSR, (n_chunks, 30522)
Row i of the matrix is chunk i of the pickle.
import pickle, scipy.sparse as sp
docs = pickle.load(open("dev/full/2/documents.pkl", "rb"))
emb = sp.load_npz("dev/full/2/embeddings.npz")
scores = emb @ query_vector # query_vector: SPLADE-encoded, (30522,)
Reproducing it
The index is derived, not primary. It is published to save ~3 GPU-hours
and to pin the exact chunker, but everything needed to rebuild it is
public: the repaired corpus above and
scripts/build_repaired_splade_store.py from the BEACON repository.
Provenance
URLs, document lists and structure come from the AVeriTeC shared task, whose terms govern that material. The indexed text was fetched from publishers' own pages and ordinary copyright applies to it. Access is gated for that reason. Please cite AVeriTeC.
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