Question: Who is Publius Licinius Crassus (Son Of Triumvir)'s father-in-law?

Knowledge 1: Publius Licinius Crassus (son of triumvir)
Publius Licinius Crassus (86 or 82 BC – 53 BC) was one of two sons of Marcus Licinius Crassus, the so-called "triumvir", and Tertulla, daughter of Marcus Terentius Varro Lucullus.He belonged to the last generation of Roman "nobiles" who came of age and began a political career before the collapse of the Republic.His peers included Marcus Antonius, Marcus Junius Brutus, Decimus Junius Brutus Albinus, the poet Gaius Valerius Catullus, and the historian Gaius Sallustius Crispus.Publius Crassus served under Julius Caesar in Gaul from 58 to 56 BC.Too young to receive a formal commission from the senate, Publius distinguished himself as a commanding officer in campaigns among the Armorican nations (Brittany) and in Aquitania.He was highly regarded by Caesar and also by Cicero, who praised his speaking ability and good character.Upon his return to Rome, Publius married Cornelia Metella, the intellectually gifted daughter of the Metellus Scipio, and began his active political career as a "monetalis" and by providing a security force during his father's campaign for a second consulship.Publius's promising career was cut short when he died along with his father in an ill-conceived war against the Parthian Empire.Cornelia, with whom he probably had no children, then married the much older Pompeius Magnus ("Pompey the Great"). [SEP] Knowledge 2: Cornelia Metella
Cornelia Metella (73 BC – after 48 BC) was the daughter of Quintus Caecilius Metellus Pius Scipio Nasica (who was a consul in 52 BC and originally from the gens Cornelia).She appears in numerous literary sources, including an official dedicatory inscription at Pergamon.
Knowledge 1: Publius Licinius Crassus (son of triumvir)
Publius Licinius Crassus (86 or 82 BC – 53 BC) was one of two sons of Marcus Licinius Crassus, the so-called "triumvir", and Tertulla, daughter of Marcus Terentius Varro Lucullus.He belonged to the last generation of Roman "nobiles" who came of age and began a political career before the collapse of the Republic.His peers included Marcus Antonius, Marcus Junius Brutus, Decimus Junius Brutus Albinus, the poet Gaius Valerius Catullus, and the historian Gaius Sallustius Crispus.Publius Crassus served under Julius Caesar in Gaul from 58 to 56 BC.Too young to receive a formal commission from the senate, Publius distinguished himself as a commanding officer in campaigns among the Armorican nations (Brittany) and in Aquitania.He was highly regarded by Caesar and also by Cicero, who praised his speaking ability and good character.Upon his return to Rome, Publius married Cornelia Metella, the intellectually gifted daughter of the Metellus Scipio, and began his active political career as a "monetalis" and by providing a security force during his father's campaign for a second consulship.Publius's promising career was cut short when he died along with his father in an ill-conceived war against the Parthian Empire.Cornelia, with whom he probably had no children, then married the much older Pompeius Magnus ("Pompey the Great"). [SEP] Knowledge 2: Apollonius (freedman)
Apollonius was a freedman of Publius Licinius Crassus in ancient Rome in the 1st century BCE.Apollonius afterwards became a useful friend of Cicero's, and served in the army of Julius Caesar in the Alexandrine war, and also followed him into Spain.He was a man of great diligence and learning, and anxious to write a history of the exploits of Caesar.For this reason Cicero gave him a very flattering letter of recommendation to Caesar.Apollonius is also believed to have written a biography of Crassus.Since he was manumitted as a term of Publius's will, he is by Roman custom likely to have taken the name Publius Licinius Apollonius as a freedman.The highly laudatory account of Publius's death found in Plutarch suggests that Apollonius's biography was a source.
Knowledge 1: Publius Licinius Crassus (son of triumvir)
Publius Licinius Crassus (86 or 82 BC – 53 BC) was one of two sons of Marcus Licinius Crassus, the so-called "triumvir", and Tertulla, daughter of Marcus Terentius Varro Lucullus.He belonged to the last generation of Roman "nobiles" who came of age and began a political career before the collapse of the Republic.His peers included Marcus Antonius, Marcus Junius Brutus, Decimus Junius Brutus Albinus, the poet Gaius Valerius Catullus, and the historian Gaius Sallustius Crispus.Publius Crassus served under Julius Caesar in Gaul from 58 to 56 BC.Too young to receive a formal commission from the senate, Publius distinguished himself as a commanding officer in campaigns among the Armorican nations (Brittany) and in Aquitania.He was highly regarded by Caesar and also by Cicero, who praised his speaking ability and good character.Upon his return to Rome, Publius married Cornelia Metella, the intellectually gifted daughter of the Metellus Scipio, and began his active political career as a "monetalis" and by providing a security force during his father's campaign for a second consulship.Publius's promising career was cut short when he died along with his father in an ill-conceived war against the Parthian Empire.Cornelia, with whom he probably had no children, then married the much older Pompeius Magnus ("Pompey the Great"). [SEP] Knowledge 2: Publius Licinius Crassus (consul 171 BC)
Publius Licinius Crassus (fl. 171 BC) was Roman consul for year 171 BC, together with Gaius Cassius Longinus.He was the son of Gaius Licinius Varus, possibly related to the Gaius Licinius Varus who was consul in 236 BC and who was still alive in 219 BC.Crassus's brother (probably his younger brother) was Gaius Licinius Crassus (consul 168 BC), and his nephew was Gaius Licinius Crassus, tribune of the plebs in about 145 BC.However, his relationship to the consuls Licinius Varus and the Pontifex Maximus Publius Licinius Crassus are not known.Licinius adopted as his son and his heir, his sister Licinia's second son, Publius Licinius Crassus Dives Mucianus.This son was born a Mucius Scaevola, son of another consul, Publius Mucius Scaevola, who attained the consulship in 175 BC, and who was brother of another consul (174 BC) and son of a praetor who had died in the Second Punic War.It was the adoptive son who also became a Pontifex Maximus and who was a political ally of the Gracchi.

Answer: Quintus Caecilius Metellus Pius Scipio Nasica