Question: The Legends of the Summer Stadium Tour was a co-headlining concert tour by American singer-songwriter Justin Timberlake and American rapper Jay Z, the tour supported  Jay Z's twelfth studio album, it was released for retail sale on which date, by Roc-A-Fella, Def Jam and Roc Nation?
{'answer': 'July 8, 2013', 'supporting_facts': [['Legends of the Summer', 1], ['Magna Carta Holy Grail', 1], ['Magna Carta Holy Grail', 2]]}