Create dataset loader for BioCreativeI

## Adding a Dataset
- **Name:** *BioCreativeI*
- **Description:** *two main tasks, the [first task](https://biocreative.bioinformatics.udel.edu/tasks/biocreative-i/first-task/) was concerned with the identification of gene mentions in text and linking protein database entries to abstracts. The [second task](https://biocreative.bioinformatics.udel.edu/tasks/biocreative-i/second-task/) was related to the extraction of human gene product annotations with GO terms*
- **Task:** *NER, TEXT CLASSIFICATION*
- **Paper:** *[link to the dataset paper](https://bmcbioinformatics.biomedcentral.com/articles/10.1186/1471-2105-6-S1-S1)*
- **Data:** *[link to the Github repository or current dataset location](https://biocreative.bioinformatics.udel.edu/news/biocreative-i/biocreative-i/)*
- **License:** *NA*
- **Motivation:** *a piece of history*