Omkar2118/datasets huggingface dataset:
GitTables-SemTab

The GitTables-SemTab dataset is a subset of the [GitTables](https://paperswithcode.com/dataset/gittables) dataset and was created to be used during the [SemTab](http://www.cs.ox.ac.uk/isg/challenges/sem-tab/) challenge. The dataset consists of 1101 tables and is used to benchmark the Column Type Annotation (CTA) task. 

Its columns were annotated using semantic properties from DBpedia and semantic types and properties from Schema.org. The table below shows the number of annotated columns and number of classes used to annotate this dataset.

|                | Columns | Classes |
|----------------|-------|-------|
| Column Type Annotation - Schema.org    |   721   |    59   |
| Column Type Annotation  - DBpedia | 2,533  |   122   |
Tough Tables

The ToughTables (2T) dataset was created for the [SemTab](http://www.cs.ox.ac.uk/isg/challenges/sem-tab/) challenge and includes 180 tables in total. The tables in this dataset can be categorized in two groups: the control (CTRL) group tables and tough (TOUGH) group tables. 

The CTRL group contains 60 tables generated by querying the DBpedia SPARQL endpoint and tables collected from Wikipedia and their characteristic is that they are easy to annotate. The TOUGH group contains 120 tables mainly scraped from the web, some containing misspelled words and nicknames/homonyms and their characteristic is that they are hard to annotate. In both groups some tables were generated by the authors where they added noise to the collected tables.

The dataset was annotated for two tasks using DBpedia (DBP) types and entities and WikiData (WD): Column Type Annotation (CTA) and Cell Entity Annotation (CEA). In the table below the number of columns annotated for the CTA and number of cells annotated for the CEA task as well as the number of classes used are listed.

|     | Annotations| Classes |
|-----|---------|---------|
| DBP-Column Type Annotation | 540     | 39 |
| DBP-Cell Entity Annotation | 663,656 | 16,023  |
| WD-Column Type Annotation| 540 | 276 |
| WD-Cell Entity Annotation | 667,244 | 24,653 |

Introducing paper: Tough Tables: Carefully Evaluating Entity Linking for Tabular Data