The analysis of the provided dataset files has identified several issues related to internal and external links within the README.md and contributing.md files. Here are the identified issues:

1. **Issue:** Potential broken internal link in README.md
   - **Evidence:** "[All tasks](../README.md) | [Interact with tasks](https://colab.research.google.com/github/google/BIG-bench/blob/main/notebooks/TaskTestingNotebook.ipynb) | [Reviewer discussion](https://github.com/google/BIG-bench/pull/260) | 38** multiple choice and **0** free text [queries of dummy model](results/dummy_model.transcript.md) | **Keywords:** [common sense](../keywords_to_tasks.md#common-sense), [json](../keywords_to_tasks.md#json), [linguistics](../keywords_to_tasks.md#linguistics), [multiple choice](../keywords_to_tasks.md#multiple-choice), [word sense disambiguation](../keywords_to_tasks.md#word-sense-disambiguation), [zero-shot](../keywords_to_tasks.md#zero-shot)"
   - **Description:** The link block in the file 'README.md' uses relative pathing that might lead to broken links or incorrect file references for "All tasks", "common sense", "json", "linguistics", "multiple choice", "word sense disambiguation", and "zero-shot".

2. **Issue:** Potential broken internal link in README.md
   - **Evidence:** "[simple_arithmetic/README.md](../simple_arithmetic/README.md)"
   - **Description:** The link '[simple_arithmetic/README.md](../simple_arithmetic/README.md)' in the file 'README.md' uses relative pathing that might lead to broken links or incorrect file references.

These issues reflect incorrect or potentially unreliable internal link references, which can lead to navigation issues for users attempting to access related documentation or tasks through these links. If the relative paths do not correctly map to the referenced files, users may encounter "404 Not Found" errors or be redirected to incorrect content.

Please note that the evidence provided is a part of the analyzed content from the files. These findings are based on the pattern matching for internal and external links, and their correctness relies on the actual file structure within the dataset. Full verification might require manual checks or automated tests that validate each link against the file system or web URLs.