Question: Which county that has Santiago Daniel Martinez Roa as a player is sometimes referred to as "Corazón de Sudamérica"?

Context paragraphs:
Santiago Daniel Martinez Roa: Santiago Daniel Martinez Roa (born 16 August 1995 in Limpio) is an Paraguayn football player who plays for Vllaznia Shkodër in the Albanian Superliga as a Midfielder.

Paraguay: Paraguay ( ; ] ; Guarani: "Paraguái" , ] ), officially the Republic of Paraguay (Spanish: "República del Paraguay" ; Guarani: "Tetã Paraguái" ), is a landlocked country in central South America, bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest.  Paraguay lies on both banks of the Paraguay River, which runs through the center of the country from north to south.  Due to its central location in South America, it is sometimes referred to as "Corazón de Sudamérica" ("Heart of South America").  Paraguay is one of the two landlocked countries (the other is Bolivia) outside Afro-Eurasia, and is the smallest landlocked country in the Americas.

County of Coimbra: The County of Coimbra (Portuguese: "Condado de Coimbra" ) was a political entity consisting of the lands of Coimbra, Viseu, Lamego and Santa Maria da Feira, in modern Portugal.  It arose within the Kingdom of Asturias following the reconquest of the region, when the lands were granted to count Hermenegildo Gutiérrez, who over the next four decades was largely responsible for the resettlement of the depopulated province.  He and his immediate successors were counts, and held Coimbra, but were not explicitly Counts of Coimbra, although they are sometimes referred to as such retrospectively.  The first nobleman specifically to be called Count of Coimbra was Gonzalo Muñoz, who was probably a scion of the family of Hermenegildo.  Becoming Count around 959, he was one of the most powerful noblemen in the western part of the kingdom until he rose in rebellion against king Bermudo II of León and was probably killed during the region's subjugation.  The degree to which his successors were alienated from their monarch can be seen when, following the region's recapture in 987 by the Moors of Al-Mansur, Gonzalo's sons joined that general in his sack of Santiago de Compostela in 997.

La Población: La Población is a music album by Chilean folk singer and songwriter Víctor Jara, recorded and released in 1972 and reissued in 2001.  It was recorded in homage of the struggle of people living in the poorest working class districts of Santiago de Chile, sometimes referred to as “shanty towns”.  The album included the collaborative work between Jara and the Chilean writer Alejandro Sieveking.  The other artists included on the album were, Isabel Parra (on the opening track, "Lo único que tengo"), Bélgica Castro, Huamarí, and Cantamaranto .

Manuel de Escandón: José Manuel María del Corazón de Jesús de Escandón y Barrón, Marquis of Villavieja (August 13, 1857 – December 13, 1940) was a Mexican polo player in the 1900 Summer Olympics.

Tomás Herrera Martínez: Tomás Herrera Martinez (born December 21, 1950 in Santiago de Cuba) is a former basketball player from Cuba, who won the bronze medal with the men's national team at the 1972 Summer Olympics in Munich, West Germany.

Popular Union of Equatorial Guinea: The Popular Union of Equatorial Guinea (Spanish: "Unión Popular de Guinea Ecuatorial" ) is a political party in the Equatorial Guinea.  It is led by Daniel Martinez Ayecaba.  It is currently one of many opposition parties in the country banned by the ruling party, the Democratic Party of Equatorial Guinea, the ruling party since 1979.

Salle Le Peletier: The Salle Le Peletier (sometimes referred to as the Salle de la rue Le Peletier or the Opéra Le Peletier) was the home of the Paris Opera from 1821 until the building was destroyed by fire in 1873.  The theatre was designed and constructed by the architect François Debret on the site of the former Hôtel de Choiseul.  Due to the many changes in government and management during the theatre's existence, it had a number of different official names, the most important of which were: Théâtre de l'Académie Royale de Musique (1821–1848), Opéra-Théâtre de la Nation (1848–1850), Théâtre de l'Académie Nationale de Musique (1850–1852), Théâtre de l'Académie Impériale de Musique (1852–1854), Théâtre Impérial de l'Opéra (1854–1870), and Théâtre National de l'Opéra (1870–1873).

Manuel Belgrano: Manuel José Joaquín del Corazón de Jesús Belgrano (3 June 1770 – 20 June 1820), usually referred to as Manuel Belgrano, was an Argentine economist, lawyer, politician, and military leader.  He took part in the Argentine Wars of Independence and created the Flag of Argentina.  He is regarded as one of the main "Libertadores" of the country.

Daniel Santiago: Daniel Gregg Santiago (born June 24, 1976) is an American-born Puerto Rican professional basketball player for the Cangrejeros de Santurce.  A center, he had a collegiate career in the NCAA and NAIA.  His professional career saw him play in the NBA, the Baloncesto Superior Nacional of Puerto Rico, and overseas.  Santiago has played for the Puerto Rican national team since 1998 until 2014, including been part of the 2004 team that defeated the United States at the 2004 Olympic Games in Greece.

Supporting paragraphs: Santiago Daniel Martinez Roa Paraguay
Answer: Paraguay