Please answer the following question: Information:  - Lazio (; ) is one of the 20 administrative regions of Italy, situated in the central peninsular section of the country. With almost 5.9 million residents and a GDP of more than 170 billion euros, Lazio is the second most populated region of Italy (having approximately the same in population as Campania), and has the second largest economy of the nation. Its capital is Rome, capital and largest city of Italy.  - Gian Francesco Poggio Bracciolini (11 February 1380  30 October 1459), best known simply as Poggio Bracciolini, was an Italian scholar and an early humanist. He was responsible for rediscovering and recovering a great number of classical Latin manuscripts, mostly decaying and forgotten in German, Swiss, and French monastic libraries. His most celebrated find was "De rerum natura", the only surviving work by Lucretius.  - Rome is a city and special "comune" (named "Roma Capitale") in Italy. Rome is the capital of Italy and of the Lazio region. With 2,870,336 residents in , it is also the country's largest and most populated "comune" and fourth-most populous city in the European Union by population within city limits. The Metropolitan City of Rome has a population of 4.3 million residents. The city is located in the central-western portion of the Italian Peninsula, within Lazio (Latium), along the shores of Tiber river. The Vatican City is an independent country geographically located within the city boundaries of Rome, the only existing example of a country within a city: for this reason Rome has been often defined as capital of two states.   - Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino and Vatican City. Italy covers an area of and has a largely temperate seasonal climate and Mediterranean climate; due to its shape, it is often referred to in Italy as "lo Stivale" (the Boot). With 61 million inhabitants, it is the fourth most populous EU member state.  - Sextus Julius Frontinus ( c. 40 -- 103 AD ) was one of the most distinguished Roman senators of the late 1st century AD . He is best known to the post-Classical world as an author of technical treatises , especially De aquaeductu , dealing with the aqueducts of Rome . In 70 AD , he was praetor , and five years later was sent into Britain to succeed Quintus Petillius Cerialis as governor of that island . He subdued the Silures and other tribes of Wales hostile to Roman invasion , establishing a new base at Caerleon or Isca Augusta for Legio II Augusta and a network of smaller forts fifteen to twenty kilometres apart for his auxiliary units . One of these forts would have been Luentinum , which controlled the gold mine of Dolaucothi , worked by numerous aqueducts . He was succeeded by Gnaeus Julius Agricola in 78 . Agricola was the father - in - law of the famous historian Tacitus . In 97 , he was appointed Water Commissioner of the aqueducts ( curator aquarum ) at Rome by the emperor Nerva , an office only conferred upon persons of very high standing . He was also a member of the College of Augurs . He produced an official report on the state of the aqueducts serving the city of Rome towards the end of the 1st century AD , the first official report of an investigation about engineering works ever to have been published . In this capacity , he followed another distinguished Roman statesman , Agrippa , the friend , ally and son - in - law of Augustus , who organised in 34 BC a campaign of public repairs and improvements , including renovation of the aqueduct Aqua Marcia and an extension of its pipes to cover more of the city .  - Vatican City , officially Vatican City State or the State of Vatican City, is a walled enclave within the city of Rome. With an area of approximately 44 hectares (110 acres), and a population of 842, it is the smallest State in the world by both area and population, but formally it is not sovereign, sovereignty being held by the Holy See, the only entity of public international law that has diplomatic relations with almost every country in the world.  - With the recovery of Frontinus' manuscript from the library at Monte Cassino in 1425, effected by the tireless humanist Poggio Bracciolini, details of the construction and maintenance of the Roman aqueduct system became available once more, just as Renaissance Rome began to revive and require a dependable source of pure water.  - Monte Cassino (sometimes written Montecassino) is a rocky hill about southeast of Rome, Italy, to the west of the town of Cassino and altitude. Site of the Roman town of Casinum, it is best known for its historic abbey. St. Benedict of Nursia established his first monastery, the source of the Benedictine Order, here around 529.  - The European Union (EU) is a political and economic union of member states that are located primarily in Europe. It has an area of , and an estimated population of over 510 million. The EU has developed an internal single market through a standardised system of laws that apply in all member states. EU policies aim to ensure the free movement of people, goods, services, and capital within the internal market, enact legislation in justice and home affairs, and maintain common policies on trade, agriculture, fisheries, and regional development. Within the Schengen Area, passport controls have been abolished. A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency.    Given the information above, choose from the list below the object entity that exhibits the relation 'date of birth' with the subject 'frontinus'.  Choices: - 11  - 11 february 1380  - 110  - 1380  - 1425  - 2  - 20  - 2002  - 30  - 336  - 4  - 510  - 529  - 61  - 842  - 870
A:
30