Question: Which canal in England was built at the Brayford Pool around 120 AD?

Context paragraphs:
Matthias of Jerusalem: Saint Matthias of Jerusalem (died 120 AD) was a 2nd-century Christian saint and a Bishop of Jerusalem, whose episcopacy was about 113–120 AD.

November 2016 Libya migrant shipwrecks: On November 3, 2016, around 240 people were killed in two migrant boat capsizing incidents off the coast of Libya.  Twenty-nine people survived the first wreck, with about 120 deaths reported.  Only two people survived the second wreck, and again around 120 deaths were reported.  Another one hundred people are believed to have drowned off the coast when their boat sank after they were abandoned off Libya without a motor on 17 November.  Twenty-seven survivors have been transported to Italy.  An estimated 4700 people have died trying to cross the Mediterranean Sea in 2016.

Marcian of Tortona: Saint Marcian (Marciano, Marziano, Marcianus) of Tortona (died 117 or 120 AD) is traditionally said to have been the first bishop of Tortona, a post he held for forty-five years.

Life of Apollonius of Tyana: Life of Apollonius of Tyana (Greek: Τὰ ἐς τὸν Τυανέα Ἀπολλώνιον ) is a book written in Ancient Greece by Philostratus (c. 170 – c. 245 AD).  It tells the story of Apollonius of Tyana (c. 40 – c. 120 AD), a Pythagorean philosopher and teacher.

Tacitus: Publius (or Gaius) Cornelius Tacitus ( ; ] ;  56 AD –  120 AD ) was a senator and a historian of the Roman Empire.  The surviving portions of his two major works—the "Annals" and the "Histories"—examine the reigns of the Roman emperors Tiberius, Claudius, Nero, and those who reigned in the Year of the Four Emperors (69 AD).  These two works span the history of the Roman Empire from the death of Augustus, in 14 AD, to the years of the First Jewish–Roman War, in 70 AD.  There are substantial lacunae in the surviving texts, including a gap in the "Annals" that is four books long.

Iavolenus Priscus: Lucius Iavolenus Priscus (c. 60 Nedinium – c. 120 AD) was an eminent Roman jurist, who had an illustrious public and military career in the Imperial service during the reigns of Nerva, Trajan, and Hadrian in various provinces around the empire.  He was the teacher of another well known Roman jurist Salvius Julianus.

Nottingham High School: Nottingham High School is an independent, fee-paying day school for boys and girls in Nottingham, England, comprising the Infant and Junior School (for ages 4–11) and Senior School (for ages 11–18).  Approximately 1,000 students attend the school, including around 700 in the Senior School (an average of around 120 in each of years 7–11 and around 50 in each of the two years of the Sixth Form).

Brayford Island: The Brayford Island is a man-made island that lies in the Brayford Pool in the centre of Lincoln in England.  A single willow tree covers the island.  It is also known as Swan Island as it is a site for nesting swans.

Brayford Pool: The Brayford Pool is a natural lake formed from a widening of the River Witham in the centre of the city of Lincoln in England.  It was used as a port by the Romans - who connected it to the River Trent by constructing the Foss Dyke - and has a long industrial heritage.

Foss Dyke: The Foss Dyke, or Fossdyke, connects the River Trent at Torksey to Lincoln, the county town of Lincolnshire, and may be the oldest canal in England that is still in use.  It is usually thought to have been built around 120 AD by the Romans, but there is no consensus among authors.  It was refurbished in 1121, during the reign of King Henry I, and responsibility for its maintenance was transferred to the city of Lincoln by King James I.  Improvements made in 1671 included a navigable sluice or lock at Torksey, and warehousing and wharves were built at Brayford Pool in the centre of Lincoln.

Supporting paragraphs: Brayford Pool Foss Dyke
Answer: Foss Dyke