Problem: *Arrabbiata sauce COUNTRY Italy; Italy LEADER_NAME Pietro Grasso; Italy DEMONYM Italians; Italy CAPITAL Rome; Italy LEADER_NAME Sergio Mattarella*
A: Arrabbiata sauce is from Italy, which is home to Italians and where Rome is the capital. Sergio Mattarella and Pietro Grasso are leaders in this country.
Problem: *Julia Morgan SIGNIFICANT_BUILDING Riverside Art Museum*
A: The Riverside Art Musuem is one of Julia Morgan's significant buildings.
Problem: *Grindavik WON 8; Grindavik PLAYED 18*
A: Team Grindavik played 18 games and won 8 of them.
Problem: *Java ETHNIC_GROUP Banyumasan people; Ayam penyet REGION Singapore; Ayam penyet COUNTRY Java*
A:
The Banyumasan people are an ethnic group from Java where Ayam penyet (which comes from the Singapore region) is found.