Acknowledgements

This work has been partially supported by Estonian Research Council Grant PUT638, The Scientific and Technological Research Council of Turkey 1001 Project (116E097), The Spanish project TIN2016-74946-P (MINECO/FEDER, UE), CERCA Programme/Generalitat de Catalunya, the COST Action IC1307 iV&L Net (European Network on Integrating Vision and Language) supported by COST (European Cooperation in Science and Technology), and the Estonian Centre of Excellence in IT (EXCITE) funded by the European Regional Development Fund. We also gratefully acknowledge the support of the NVIDIA Corporation with the donation of the Titan X Pascal GPU.

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