Update README.md

README.md

@@ -6,4 +6,8 @@ task_categories:
 - question-answering
 language:
 - en
----
+---
+
+This dataset is based on [MMLU](https://arxiv.org/abs/2009.03300), [FLAN](https://arxiv.org/abs/2109.01652), [Big Bench Hard](https://arxiv.org/abs/2210.09261) and [AgiEval English](https://arxiv.org/abs/2304.06364).
+The non-"reduced" benchmark is the original benchmark, except for FLAN, which is a sampled version. 
+The "reduced" benchmark only contains a few representative tasks in the original ones, such that the performance on the "reduced" benchmark can serve as an approximation to the performance on the original ones.