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README.md

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+---
+pretty_name: '`trec-cast/v1/2020`'
+viewer: false
+source_datasets: ['irds/trec-cast_v1']
+task_categories:
+- text-retrieval
+---
+
+# Dataset Card for `trec-cast/v1/2020`
+
+The `trec-cast/v1/2020` dataset, provided by the [ir-datasets](https://ir-datasets.com/) package.
+For more information about the dataset, see the [documentation](https://ir-datasets.com/trec-cast#trec-cast/v1/2020).
+
+# Data
+
+This dataset provides:
+ - `queries` (i.e., topics); count=216
+ - `qrels`: (relevance assessments); count=40,451
+
+ - For `docs`, use [`irds/trec-cast_v1`](https://huggingface.co/datasets/irds/trec-cast_v1)
+
+This dataset is used by: [`trec-cast_v1_2020_judged`](https://huggingface.co/datasets/irds/trec-cast_v1_2020_judged)
+
+
+## Usage
+
+```python
+from datasets import load_dataset
+
+queries = load_dataset('irds/trec-cast_v1_2020', 'queries')
+for record in queries:
+    record # {'query_id': ..., 'raw_utterance': ..., 'automatic_rewritten_utterance': ..., 'manual_rewritten_utterance': ..., 'manual_canonical_result_id': ..., 'topic_number': ..., 'turn_number': ...}
+
+qrels = load_dataset('irds/trec-cast_v1_2020', 'qrels')
+for record in qrels:
+    record # {'query_id': ..., 'doc_id': ..., 'relevance': ..., 'iteration': ...}
+
+```
+
+Note that calling `load_dataset` will download the dataset (or provide access instructions when it's not public) and make a copy of the
+data in 🤗 Dataset format.
+
+## Citation Information
+
+```
+@inproceedings{Dalton2020Cast,
+  title={CAsT 2020: The Conversational Assistance Track Overview},
+  author={Jeffrey Dalton and Chenyan Xiong and Jamie Callan},
+  booktitle={TREC},
+  year={2020}
+}
+```

trec-cast_v1_2020.py

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+
+"""
+""" # TODO
+try:
+    import ir_datasets
+except ImportError as e:
+    raise ImportError('ir-datasets package missing; `pip install ir-datasets`')
+import datasets
+
+IRDS_ID = 'trec-cast/v1/2020'
+IRDS_ENTITY_TYPES = {'queries': {'query_id': 'string', 'raw_utterance': 'string', 'automatic_rewritten_utterance': 'string', 'manual_rewritten_utterance': 'string', 'manual_canonical_result_id': 'string', 'topic_number': 'int64', 'turn_number': 'int64'}, 'qrels': {'query_id': 'string', 'doc_id': 'string', 'relevance': 'int64', 'iteration': 'string'}}
+
+_CITATION = '@inproceedings{Dalton2020Cast,\n  title={CAsT 2020: The Conversational Assistance Track Overview},\n  author={Jeffrey Dalton and Chenyan Xiong and Jamie Callan},\n  booktitle={TREC},\n  year={2020}\n}'
+
+_DESCRIPTION = "" # TODO
+
+class trec_cast_v1_2020(datasets.GeneratorBasedBuilder):
+    BUILDER_CONFIGS = [datasets.BuilderConfig(name=e) for e in IRDS_ENTITY_TYPES]
+
+    def _info(self):
+        return datasets.DatasetInfo(
+            description=_DESCRIPTION,
+            features=datasets.Features({k: datasets.Value(v) for k, v in IRDS_ENTITY_TYPES[self.config.name].items()}),
+            homepage=f"https://ir-datasets.com/trec-cast#trec-cast/v1/2020",
+            citation=_CITATION,
+        )
+
+    def _split_generators(self, dl_manager):
+        return [datasets.SplitGenerator(name=self.config.name)]
+
+    def _generate_examples(self):
+        dataset = ir_datasets.load(IRDS_ID)
+        for i, item in enumerate(getattr(dataset, self.config.name)):
+            key = i
+            if self.config.name == 'docs':
+                key = item.doc_id
+            elif self.config.name == 'queries':
+                key = item.query_id
+            yield key, item._asdict()
+
+    def as_dataset(self, split=None, *args, **kwargs):
+        split = self.config.name # always return split corresponding with this config to avid returning a redundant DatasetDict layer
+        return super().as_dataset(split, *args, **kwargs)