INRES-Phytomedicine, University of Bonn, Meckenheimer Allee 166a, Bonn, 53115, Germany. mirwaes@uni-bonn.de.|IGG-Geodesy, University of Bonn, Nussallee 17, Bonn, 53115, Germany. paulus@igg.uni-bonn.de.|Computer Science Department, TU Dortmund University, Otto-Hahn-Str. 14, Dortmund, 44227, Germany. kristian.kersting@cs.tu-dortmund.de.|INRES-Phytomedicine, University of Bonn, Meckenheimer Allee 166a, Bonn, 53115, Germany. amahlein@uni-bonn.de.