First Author:   Lukas Wiechers Paderborn University luwi@mail.upb.de   Warburger Str. 100 Paderborn, 33098, Germany   +49 5251 60-2115(Phone) +49 5251 60-2115(Fax) Second Author: Thomas Gries Paderborn University thomas.gries@notes.upb.de   Warburger Str. 100 Paderborn, 33098, Germany   +49 5251 60-2113(Phone)   https://wiwi.uni-paderborn.de/dep4/gries Third Author: Sebastian José Luna-Victoria Paderborn University lunav@mail.upb.de   Warburger Str. 100 Paderborn, 33098, Germany   +49 5251 60-2115(Phone)