Bibliography (6):

1. Attention Is All You Need

2. BERT: Pre-training of Deep Bidirectional Transformers for Language Understanding

3. Unsupervised Cross-lingual Representation Learning at Scale

4. GLUE: A Multi-Task Benchmark and Analysis Platform for Natural Language Understanding

5. Wikipedia Bibliography:

   1. Common Crawl

   2. https://en.wikipedia.org/wiki/F-score  :

      https://en.wikipedia.org/wiki/F-score