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@inproceedings{AMW-2017-certain-answers, author = {Marcelo Arenas and Elena Botoeva and Egor V. Kostylev and Vladislav Ryzhikov}, title = {A Note on Computing Certain Answers to Queries over Incomplete Databases}, booktitle = {Proc. of the 11th Alberto Mendelzon Int. Workshop on Foundations of Data Management and the Web (AMW 2017)}, year = {2017}, webpdf = {https://www.doc.ic.ac.uk/~ebotoeva/papers/abkr-AMW-17.pdf}, }