small readme change

README.md

 ### Themis Debiasing System
 
-Paper [here](https://arxiv.org/abs/).
 Extended Paper [here](https://arxiv.org/abs/2002.09799).
 
 #### A Quick Note
@@ -23,4 +22,4 @@ For the BN experiments on the CHILD data, see ForGraphs/CherryTree/run_instructi
 
 For the Point Query experiments on the Flights and IMDB data, see ForGraphs/ModelV2ErrorSummary/run_instructions.txt
 
-For the IDEBench experiments on the Flights data, see ForGraphs/IDEErrorSummary/run_instructions.txt. You could use this to do point queries, too.
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+For the IDEBench experiments on the Flights data, see ForGraphs/IDEErrorSummary/run_instructions.txt. You could use this to do point queries, too.