Question: What country do Acera and Umbria have in common?

Context articles: Flag of Umbria
Acera
Roman Umbria
Umbria
San Damiano cross
Ferro (architecture)
Italian regional elections, 2015
Province of Pesaro and Urbino
Sagrantino di Montefalco
Massese sheep

The flag of Umbria is one of the official symbols of the region of Umbria, Italy.
 The current flag was officially adopted on 18 March 2004, although the emblem and gonfalon had been in use since the 1970s.
 The Regional Law of 18 May 2004 officially confirmed the flag and added the words "Regione Umbria" ("Umbria Region") in red, centered in the bottom fifth of the flag, but in common usage, the words are omitted.
Acera is a "frazione" of the "comune" of Campello sul Clitunno in the Province of Perugia, Umbria, central Italy.
 It stands at an elevation of 972 metres above sea level.
 At the time of the Istat census of 2001 it had 19 inhabitants.
Roman Umbria is a modern name for one of the 11 administrative regions into which the emperor Augustus divided Italy.
 The main source for the regions is the "Historia Naturalis" of Pliny the Elder, who informs his readers he is basing the geography of Italy on the "discriptio Italiae", "division of Italy," made by Augustus.
 The "Sexta Regio" ("6th Region") is called "Umbria complexa agrumque Gallicam citra Ariminium", "Umbria including the Gallic country this side of Rimini."
Umbria ( ; ] ), is a region of central Italy.
 It is the only Italian region having neither a coastline nor a border with other countries.
 It includes the Lake Trasimeno, Marmore's Falls, and is crossed by the River Tiber.
 The regional capital is Perugia.
 Umbria is known for its landscapes, traditions, history, culinary delights, artistic legacy, and influence on culture.
The San Damiano Cross was one of a number of crosses painted with similar figures during the 12th century in Umbria.
 The name of the painter is unknown, but it was made around the year 1100.
 The purpose of an icon cross was to teach the meaning of the event depicted and thereby strengthen the faith of the people.
 The Byzantine style was common in Italy before Cimabue and Giotto.
A ferro (plural ferri) or ferro da facciata is an item of functional wrought-iron work on the façade of an Italian building.
 "Ferri" are a common feature of Medieval and Renaissance architecture in Lazio, Tuscany and Umbria.
 They are of three main types: "ferri da cavallo" have a ring for tethering horses, and are set at about from the ground; holders for standards and torches are placed higher on the façade and on the corners of the building; "arpioni" have a cup-shaped hook or hooks to support cloth for shade or to be dried, and are set near balconies.
A large round of regional elections were held in Italy on 31 May 2015 in seven of the twenty regions composing the country, including four of the ten largest ones: Campania, Veneto, Apulia and Tuscany.
 The other three regions holding elections were Liguria, Marche, Umbria.
The Province of Pesaro and Urbino (Italian: "Provincia di Pesaro e Urbino" , ] ) is a province in the Marche region of Italy.
 Its capital is the city of Pesaro.
 It also borders the state of San Marino.
 The province is surrounded by San Marino and Emilia Romagna in the north, Umbria and Tuscany in the west, Ancona in the south and the Adriatic Sea on the east.
 The province has an enclave of the umbrian common of Citta' di Castello named Monte Ruperto.The province is also known as "Riviera of Hills".
 It is mostly covered by hills and is popular for its beaches.
 The Ceramics museum and the Biblioteca Oliveriana are located in the capital city.
 The County Council is based in Pesaro while the headquarters of the provincial administration are in Urbino.
 The coat of arms of the province consists of a shield divided into two parts, each part is given the coat of arms of the two capitals.
 It has a robust economy with low unemployment, based on craft and small and medium industries, agriculture, tourism, resorts and cultural center.
 It has a very low per capita energy consumption.
 The art and craft industry contributes to 22% of the province's GDP.
 Tourism in the province plays a primary role in the local economy, the main attractions are the sea and the Apennines.
 The beaches of Gabicce Mare, Pesaro, Fano and Marotta are the most famous ones.
Sagrantino di Montefalco is the name given to Italian wines made with 100% Sagrantino grapes in and around the comune of Montefalco in the Province of Perugia, Umbria.
 The wines gained DOC status in 1979 and were elevated to DOCG status, the highest-ranking category of Italian wine denominations, in 1992 after a renewal of interest in the wine from winemakers, particularly Arnaldo Caprai.
 There are two DOCG wines: Montefalco Sagrantino Secco, an oak-aged dry red wine (""secco"" is Italian for "dry"), and the less common Montefalco Sagrantino Passito, a sweet, dessert red wine.
The Massese is a breed of domestic sheep from the Alpi Apuane mountains of the province of Massa Carrara, in Tuscany, central Italy.
 It takes its name from the town of Massa.
 It is raised throughout most of Tuscany, and also in Emilia–Romagna, Liguria and Umbria.
 It has common origins with the other indigenous sheep breeds of the Apennines.