question: Who is Nero Claudius Drusus's father?
context: [["Lars Eliasson", ["He is the father of the later Member of Parliament Anna Eliasson."]], ["Nero Claudius Drusus", ["Nero Claudius Drusus Germanicus (January 14, 38 BC \u2013 summer of 9 BC), born Decimus Claudius Drusus, also called Drusus Claudius Nero, Drusus, Drusus I, Nero Drusus, or Drusus", "the Elder was a Roman politician and military commander.", "He was a patrician Claudian on his birth father's side but his maternal grandmother was from a plebeian family.", "He was the son of Livia Drusilla and the legal stepson of her second husband, the Emperor Augustus.", "He was also brother of the Emperor Tiberius, father to both the Emperor Claudius and general Germanicus, paternal grandfather of the Emperor Caligula, and maternal great-grandfather of the Emperor Nero.", "He launched the first major Roman campaigns across the Rhine and began the conquest of Germania, becoming the first Roman general to reach the Weser and Elbe rivers.", "In 12 BC, Drusus led a successful campaign into Germania, subjugating the Sicambri.", "Later that year he led a naval expedition against Germanic tribes along the North Sea coast, conquering the Batavi and the Frisii, and defeating the Chauci near the mouth of the Weser.", "In 11 BC, he conquered the Usipetes and the Marsi, extending Roman control to the Upper Weser.", "In 10 BC, he launched a campaign against the Chatti and the resurgent Sicambri, subjugating both.", "The following year, while serving as consul, he conquered the Mattiaci and defeated the Marcomanni and the Cherusci, the latter near the Elbe.", "However, Drusus died later that year, depriving Rome of one of its best generals."]], ["Cleomenes II", ["Cleomenes II( died 309 BC) was Agiad King of Sparta from 369 to 309 BC.", "The son of Cleombrotus I, he succeeded his brother Agesipolis II.", "He was the father of Acrotatus I, the father of Areus I, and of Cleonymus, the father of Leonidas II."]], ["Ronald Mourad Cohen", ["Sir Ronald Mourad Cohen( born 1 August 1945) is an Egyptian- born British businessman and political figure.", "He is the chairman of The Portland Trust and Bridges Ventures.", "He has been described as\" the father of British venture capital\" and\" the father of social investment\"."]], ["Obata Toramori", ["He was the father of Obata Masamori."]], ["\u00d6sten M\u00e4kitalo", ["\u00d6sten M\u00e4kitalo( 27 August 1938 \u2013 16 June 2011) was a Swedish electrical engineer.", "He is considered to be the father of the Nordic Mobile Telephone( NMT) system and many times the father of cellular phone."]], ["Yasuichi Oshima", ["He is the father of manga artist Towa Oshima."]], ["Livilla", ["Claudia Livia", "Julia( Classical Latin:; c. 13 BC \u2013 AD 31) was the only daughter of Nero Claudius Drusus and Antonia Minor and sister of the Roman Emperor Claudius and general Germanicus, and thus the paternal aunt of the emperor Caligula and maternal great- aunt of emperor Nero, as well as the niece and daughter- in- law of Tiberius.", "She was named after her grandmother, Augustus' wife Livia Drusilla, and commonly known by her family nickname Livilla(\" little Livia\").", "She was born after Germanicus and before Claudius.", "She was twice married to the potential successor in the Julio- Claudian dynasty, first to Augustus' grandson Gaius Caesar( died 4 AD) and later to Tiberius' son Drusus the Younger( died AD 23).", "Allegedly, she helped her lover Sejanus in poisoning her second husband and died shortly after Sejanus fell from power in AD 31."]], ["Tiberius Claudius Nero (praetor 42 BC)", ["Tiberius Claudius Nero, often known as Tiberius Nero and Nero( 85\u201333 BC) was a politician who lived in the last century of the Roman Republic.", "He was the first husband of Livia, but was forced to divorce her in 38 BC so that she could marry the future emperor Augustus.", "Nero was the father of the second Roman emperor Tiberius,( who became the stepson of the emperor Augustus and was adopted by Augustus as his heir), and Roman general Nero Claudius Drusus.", "He was also the paternal grandfather of Emperor Claudius, General Germanicus, and Consul Drusus Julius Caesar, paternal great- grandfather of Emperor Caligula and Empresses Agrippina the Younger and Claudia Octavia and maternal great- great- grandfather of Emperor Nero."]], ["Tiberius", ["Tiberius (16 November 42 BC \u2013 16 March 37 AD) was the second Roman emperor, reigning from 14 AD to 37 AD, succeeding Augustus.", "Born to Tiberius Claudius Nero and Livia Drusilla in a Claudian family, he was given the personal name Tiberius Claudius Nero.", "His mother divorced Nero and married Octavian\u2014later to ascend to Emperor as Augustus\u2014who officially became his stepfather.", "Tiberius would later marry Augustus' daughter (from his marriage to Scribonia), Julia the Elder, and even later be adopted by Augustus.", "Through the adoption, he officially became a Julian, assuming the name Tiberius Julius Caesar.", "The emperors after Tiberius would continue this blended dynasty of both families for the following thirty years; historians have named it the Julio-Claudian dynasty.", "His relationship to the other emperors of this dynasty was as follows: he was the stepson of Augustus, grand-uncle of Caligula, paternal uncle of Claudius, and great-grand uncle of Nero.", "Tiberius' 22-and-a-half-year reign would be the longest after that of Augustus until that of Antoninus Pius, who surpassed his reign by a few months.", "Tiberius was one of the greatest Roman generals; his conquest of Pannonia, Dalmatia, Raetia, and (temporarily) parts of Germania, laid the foundations for the northern frontier.", "Even so, he came to be remembered as a dark, reclusive and sombre ruler who never really desired to be emperor; Pliny the Elder called him \"the gloomiest of men\".", "After the death of his son Drusus Julius Caesar in 23 AD, Tiberius became more reclusive and aloof.", "In 26 AD he removed himself from Rome and left administration largely in the hands of his unscrupulous Praetorian prefects Lucius Aelius Sejanus and Quintus Naevius Sutorius Macro.", "When Tiberius died, he was succeeded by his grand-nephew and adopted grandson, Caligula."]]]
supporting_facts: [["Nero Claudius Drusus", 4], ["Tiberius", 1]]
evidences: [["Nero Claudius Drusus", "sibling", "Tiberius"], ["Tiberius", "father", "Tiberius Claudius Nero"]]
answer: Tiberius Claudius Nero