In this task, you will be presented with a context from an academic paper and you have to write an answerable question based on the context. Your questions can be extractive, abstractive, or yes-no questions.
Q: We test our proposed approach on three public short text datasets.  SearchSnippets. This dataset was selected from the results of web search transaction using predefined phrases of 8 different domains by Phan et al. BIBREF41 . StackOverflow. We use the challenge data published in Kaggle.com.  Biomedical. We use the challenge data published in BioASQ's official website. 
A: 
What datasets did they use?