1. Department of Physics and Astronomy; University of California; Irvine California 92697
2. Machine Learning Group; Technical University of Berlin; 10587 Germany
3. Max Planck Institute of Microstructure Physics; Weinberg 2 Halle Saale 06120 Germany
4. Department of Physics; Vanderbilt University; Nashville Tennessee 37235
5. Department of Chemistry; University of California; Irvine California 92697
6. Department of Computer Science; University of California; Irvine California 92697
7. Institute of Physical Chemistry and National Center for Computational Design and Discovery of Novel Materials (MARVEL), Department of Chemistry, University of Basel CH-4056, Switzerland Present address: Fritz Haber Institute of the Max Planck Society, 14195 Berlin, Germany
8. Department of Brain and Cognitive Engineering; Korea University; Anam-Dong, Seongbuk-Gu Seoul 136-713 Korea