backgroundlinking19.template

# Anserini: Regressions for [TREC 2019 Background Linking](http://trec-news.org/)

This page describes regressions for the background linking task in the [TREC 2019 News Track](http://trec-news.org/).
The exact configurations for these regressions are stored in [this YAML file](../src/main/resources/regression/backgroundlinking19.yaml).
Note that this page is automatically generated from [this template](../src/main/resources/docgen/templates/backgroundlinking19.template) as part of Anserini's regression pipeline, so do not modify this page directly; modify the template instead.

## Indexing

Typical indexing command:

```
${index_cmds}
```

The directory `/path/to/core18/` should be the root directory of the [TREC Washington Post Corpus](https://trec.nist.gov/data/wapost/), i.e., `ls /path/to/core18/`
should bring up a single JSON file.

For additional details, see explanation of [common indexing options](common-indexing-options.md).

## Retrieval

Topics and qrels are stored in [`src/main/resources/topics-and-qrels/`](../src/main/resources/topics-and-qrels/), downloaded from NIST:

+ [`topics.backgroundlinking19.txt`](../src/main/resources/topics-and-qrels/topics.backgroundlinking19.txt): topics for the background linking task of the TREC 2019 News Track
+ [`qrels.backgroundlinking18.txt`](../src/main/resources/topics-and-qrels/qrels.backgroundlinking18.txt): qrels for the background linking task of the TREC 2019 News Track

After indexing has completed, you should be able to perform retrieval as follows:

```
${ranking_cmds}
```

Evaluation can be performed using `trec_eval`:

```
${eval_cmds}
```

## Effectiveness

With the above commands, you should be able to replicate the following results:

${effectiveness}