Update README.md

vzhong · web-flow · commit 59d8c89980bb · 2017-09-04T10:23:22.000+02:00
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 WikiSQL is a large crowd-sourced dataset for developing natural language interfaces for relational databases.
 WikiSQL is the dataset released along with our work [Seq2SQL: Generating Structured Queries from
-Natural Language using Reinforcement Learning](https://stg.einstein.ai/static/images/layouts/research/seq2sql/seq2sql.pdf).
+Natural Language using Reinforcement Learning](http://arxiv.org/abs/1709.00103).
 
 
 ## Citation
