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For details describing the origin of this dataset, please refer to "Knowledge Graph Based Synthetic Corpus Generation for Knowledge-Enhanced Language Model Pre-training", Oshin Agarwal, Heming Ge, Siamak Shakeri, Rami Al-Rfou.

This corpus consists of two parts: TEKGEN (Text From KG Generatiom) training corpus and the generated synthetic KELM (Knowledge Enhanced Language Model Pre-training) corpus.

Part 1: TEKGEN Training Corpus

This is the Wikipedia text--Wikidata KG aligned corpus used to train the data-to-text generation model. Please note that this is a corpus generated with distant supervision and should not be used as gold standard for evaluation.

It consists of 3 files:

  1. https://storage.googleapis.com/gresearch/kelm-corpus/updated-2021/quadruples-train.tsv
  2. https://storage.googleapis.com/gresearch/kelm-corpus/updated-2021/quadruples-validation.tsv
  3. https://storage.googleapis.com/gresearch/kelm-corpus/updated-2021/quadruples-test.tsv

Each file contains one example per line. Each example is a json object with three fields:

  1. triples: A list of triples of the form (subject, relation, object). eg. (Person X, award received, Award Y). If the triple has a subproperty, then it is quadruple instead. eg. (Person X, Award Y, received on, Date Z).

  2. serialized triples: triples concatenated together as used for input to T5. The format is "<subject> <relation> <object>" where some subjects have multiple relations, e.g. "<subject> <relation1> <object1> <relation2> <object2> <relation3> <object3>". For more details on how these relations are grouped, please refer to the paper.

  3. sentence: The wikipedia sentence aligned to these triples.

The names, aliases and Wikidata Ids of the entities can be found in https://storage.googleapis.com/gresearch/kelm-corpus/updated-2021/entities.jsonl.

Part 2: KELM Corpus

This is a synthetic corpus that consists of the entire Wikidata KG as natural text sentences. It has ~15M sentences synthetically generated using a T5 model fine-tuned on the data from Part 1 with some additional components. It can be used as additional data in language model pre-training as a means to integrate KGs with natural text.

https://storage.googleapis.com/gresearch/kelm-corpus/updated-2021/kelm_generated_corpus.jsonl

Each line is an example as a json object with three fields:

  1. triples: A list of triples of the form (subject, relation, object). eg. (Person X, award received, Award Y). If the triple has a subproperty, then it is quadruple instead. eg. (Person X, Award Y, received on, Date Z). These triples are entity subgraphs as described in the paper.

  2. serialized triples: triples concatenated together as used for input to T5. The format is "<subject> <relation> <object>" where some subjects have multiple relations, e.g. "<subject> <relation1> <object1> <relation2> <object2> <relation3> <object3>". For more details on how these relations are grouped, please refer to the paper.

  3. gen_sentence: The generated natural language sentence for the triples.

About 0.1% of the examples in kelm_generated_corpus.jsonl are missing the "triples" field.

The names, aliases and Wikidata Ids of the entities can be found in https://storage.googleapis.com/gresearch/kelm-corpus/updated-2021/entities.jsonl.

License

This dataset has been released under the CC BY-SA 2.0 license.