Amatriciana sauce can be found in Italy, where Italians are from, and the capital is Rome. It is also where Sergio Mattarella and Pietro Grasso are leaders.
[['Italy', 'LEADER_NAME', 'Pietro Grasso'], ['Italy', 'DEMONYM', 'Italians'], ['Italy', 'CAPITAL', 'Rome'], ['Amatriciana sauce', 'COUNTRY', 'Italy'], ['Italy', 'LEADER_NAME', 'Sergio Mattarella']]