Question: The River Bush's tributary, Saint Columb's Rill, is used to source which distillery in Northern Ireland?

Context paragraphs:
Great Seal of Northern Ireland: The Great Seal of Northern Ireland is the seal used for Northern Ireland.  The great seal is in the possession of the Secretary of State for Northern Ireland.  The Great Seal was created by the Irish Free State (Consequential Provisions) Act 1922 on the creation of Northern Ireland for possession by the Governor of Northern Ireland to "be used for all matters in Northern Ireland for which the Great Seal of Ireland was theretofore used"

Dunluce Lower: Dunluce Lower (Irish: "Dún Libhse Íochtarach" ) is a barony in County Antrim, Northern Ireland.  To its north runs the north-Antrim coast, and it is bordered by three other baronies: Dunluce Upper to the south, Cary to the east, and the North East Liberties of Coleraine to the west.  The River Bush flows through this barony.  Dunluce Lower also formed the northern part of the medieval territory known as the Route.

River Bush: The River Bush (from the Irish: "an Bhuais" ) is an Ulster river in County Antrim, Northern Ireland.  The River Bush is 33.5 mi long.  The river's source is in the Antrim Hills at 480m.  From there the river flows northwest, with a bend at the town of Armoy.  It then flows west, passing through Stranocum, and then bends north, passing through Bushmills before reaching the sea at Portballintrae on the North Antrim coast.  It flows through a fertile valley devoted to grassland-based agriculture with limited arable cropping.  The underlying geology is basalt and the water is slightly alkaline with magnesium making an unusually large contribution to total hardness.  The river supports indigenous stocks of Atlantic salmon and brown trout.  Saint Columb's Rill, which is a tributary of the river, is the source of water used for distilling Bushmills whiskey.

Bushmills: Bushmills is a village on the north coast of County Antrim, Northern Ireland.  Bushmills had 1,319 inhabitants in the 2001 Census.  It is located 60 mi from Belfast, 11 mi from Ballycastle and 9 mi from Coleraine.  The village owes its name to the River Bush and to a large watermill that was built there in the early 17th century.

Eilne: Eilne, also spelt as Eilni, alias Mag nEilne, was a medieval Irish Cruthin petty-kingdom in the over-kingdom of Ulaid.  It lay between the River Bann and River Bush, and was centered on Magh nEilne, the "plain of Eilne", spanning north-east County Londonderry and north-west County Antrim, in present-day Northern Ireland.  Eilne may represent the name of an original population grouping, though even in the Old Irish period who they were was forgotten.

River Bann: The River Bann (Irish: "an Bhanna" , from "ban-dea", meaning "goddess"; Ulster-Scots: "Bann Wattèr") is the longest river in Northern Ireland, its length, Upper and Lower Bann combined, being 129 km (80 mi).  However, the total length of the River Bann, including its path through the 30 km (19 mi) long Lough Neagh is 159 km (99 mi).  Another length of the River Bann given is 90 mi.  The river winds its way from the southeast corner of Northern Ireland to the northwest coast, pausing in the middle to widen into the enormous Lough Neagh.  The River Bann catchment has an area of 5,775 km.  The River Bann has a mean discharge rate of 92 m/s.  According to C.Michael Hogan, the Bann River Valley is a settlement area for some of the first human arrivals in Ireland after the most recent glacial retreat.  The river has played an important part in the industrialisation of the north of Ireland, especially in the linen industry.  Today salmon and eel fisheries are the most important economic features of the river.  The river is often used as a dividing line between the eastern and western areas of Northern Ireland, often labelled the "Bann divide".  Towns, councils and businesses "west of the Bann" are often seen as having less investment and government spending than those to the east.  It is also seen as a religious, economic and political divide, with Catholics and Irish nationalists being in the majority to the west, and Ulster Protestants and unionists in the majority to the east; and with the financial and industrial capital of Greater Belfast to the east with the west of the Bann being more agricultural and rural.

Old Bushmills Distillery: The Old Bushmills Distillery is a distillery in Bushmills, County Antrim, Northern Ireland.  s of December 2014 , it was in the process of transitioning from ownership by Diageo plc to Jose Cuervo.  All of the whiskey bottled under the Bushmills whiskey brand is produced at the Bushmills Distillery and uses water drawn from Saint Columb's Rill, which is a tributary of the River Bush.  The distillery is a popular tourist attraction, with around 120,000 visitors per year.

Saint Columbs Rill: Saint Columb's Rill is a tributary of the much more famous River Bush ("An Bhuais" in Irish) in Northern Ireland.  This 'rill' or rivulet is really a small stream that rises in bog land approximately five miles (eight kilometres) southeast of the village of Bushmills in County Antrim.  The rill is named after the patron saint of Derry ("Doire" in Irish).

Armoy, County Antrim: Armoy (from Irish: "Oirthear Maí" ) is a village and civil parish in County Antrim, Northern Ireland.  It is 5.5 miles (9 km) southwest of Ballycastle and 8 miles (13 km) northeast of Ballymoney.  According to an estimate in 2013 by the Northern Ireland Statistics and Research Agency it had a population of 1,122.  The village is on the River Bush between two of the nine Glens of Antrim; Glenshesk and Glentaisie.  The Armoy area also includes half of Knocklayd mountain which lies to the northeast of the village.

River Dun, Northern Ireland: The River Dun, also known as the Glendun River (in Irish: "Abhann Duinne", brown river) is a river in County Antrim, Northern Ireland.  It runs through Glendun, one of the nine Glens of Antrim.  The river is named after its brown colour, which comes from the peat bogs at its source on the slopes of Slievenanee on the Antrim Plateau.  The source of the river is a few hundred metres from that of the River Bush, which flows north-east to meet the sea at Bushmills.  Cushendun ("Bun Abhann Duinne", "foot of the River Dun" in Irish – although the English name derives from "Cois Abhann Duinne", "beside the River Dun") is a small coastal resort town lying at the mouth of the River Dun and Glendun.

Supporting paragraphs: River Bush Old Bushmills Distillery
Answer: Old Bushmills Distillery