Was Lucrezia Tornabuoni the mother of Lorenzo de' Medici?
ASK WHERE { <http://dbpedia.org/resource/Lorenzo_de'_Medici> <http://dbpedia.org/property/mother> <http://dbpedia.org/resource/Lucrezia_Tornabuoni> }
Lorenzo_de'_Medici Lucrezia_Tornabuoni