Add KEEPHA-ADR

## Adding a Dataset
- **Name:** KEEPHA-ADR
- **Description:** This work presents a multilingual corpus of texts concerning ADRs
gathered from diverse sources, including patient fora, social media, and clinical reports in German, French,
and Japanese. Our corpus contains annotations covering 12 entity types, four attribute types, and 13 relation
types. It contributes to the development of real-world multilingual language models for healthcare
- **Task:** NER
- **Paper:** https://arxiv.org/pdf/2403.18336
- **Data:** https://github.com/Dotkat-dotcome/KEEPHA-ADR
- **License:** MIT