Add XOR QA Dataset
Added XOR Question Answering Dataset. The link to the dataset can be found [here](https://nlp.cs.washington.edu/xorqa/)

- [x] Followed the instructions in CONTRIBUTING.md
- [x] Ran the tests successfully
- [x] Created the dummy data
Hi @sumanthd17 

Looks like a good start! You will also need to add a Dataset card, following the instructions given [here](https://github.com/huggingface/datasets/blob/master/ADD_NEW_DATASET.md#manually-tag-the-dataset-and-write-the-dataset-card) I followed the instructions mentioned there but my dataset isn't showing up in the dropdown list. Am I missing something here? @yjernite  > I followed the instructions mentioned there but my dataset isn't showing up in the dropdown list. Am I missing something here? @yjernite

The best way is to run the tagging app locally and provide it the location to the `dataset_infos.json` after you've run the CLI:
https://github.com/huggingface/datasets-tagging
 This is a really good data card!!

Small changes to make it even better:
- Tags: the dataset has both "original" data and data that is "extended" from a source dataset: TydiQA - you should choose both options in the tagging apps
- The language and annotation creator tags are off: the language here is the questions: I understand it's a mix of crowd-sourced and expert-generated? Is there any machine translation involved? The annotations are the span selections: is that crowd-sourced?
- Personal and sensitive information: there should be a statement there, even if only to say that none could be found or that it only mentions public figures