input: Please answer the following: This article: Drilling fluids are necessary for borehole stability in deep cores, and can also be used to circulate cuttings away from the bit. Fluids used include water, ethanol/water and water/ethylene glycol mixtures, petroleum fuels, non-aromatic hydrocarbons, and n-butyl acetate. Water is the cheapest and cleanest option; it may be present on the glacial surface or may be created by thermal drilling. In cold ice some form of antifreeze is necessary, or heat must be reapplied by reaming the hole periodically. Ethanol and water. Ethanol acts as an anti-freeze in water; at sufficient concentrations it can reduce the freezing temperature of the mixture to well below any temperature likely to be encountered in ice drilling. The concentration must be chosen to prevent the liquid freezing and also to maintain the borehole against the ice overburden pressure. Because the density of the mixture decreases with lower temperatures, vertical convection will develop in boreholes where temperatures decrease with depth, as the lighter mixture rises. This causes slush to form in the borehole, though successful drilling is still possible. Ethanol is one of the cheapest options for a drilling fluid, and requires less storage space than other options because in use it is diluted with water. A Soviet expedition left an 800 m borehole in Antarctica filled with ethanol and water at an ice temperature of 53 C; after 11 months the borehole remained open and drilling was resumed with no problems. A problem with this option is that the mixture will penetrate cores that have cracks. Ethylene glycol and water was used at Camp Century in 1966 in the lower part of the hole to dissolve the cuttings. Petroleum fuels. This includes diesel, jet fuel, and kerosene. They are inexpensive and easily available, and were once in common use; disadvantages include flammability and the aromatics they contain, which are a health hazard. Non-aromatic hydrocarbons. As of 2009 these had become the most commonly used drilling fluids; eliminating the... contains an answer for the question: What is the name of the specific category of drilling fluid that includes includes diesel, jet fuel, and kerosene?, what is it ?
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output: Petroleum fuels

input: Please answer the following: This article: Charlemagne planned to continue the Frankish tradition of dividing his kingdom between all his heirs, but was unable to do so as only one son, Louis the Pious (r. 814840), was still alive by 813. Just before Charlemagne died in 814, he crowned Louis as his successor. Louis's reign of 26 years was marked by numerous divisions of the empire among his sons and, after 829, civil wars between various alliances of father and sons over the control of various parts of the empire. Eventually, Louis recognised his eldest son Lothair I (d. 855) as emperor and gave him Italy. Louis divided the rest of the empire between Lothair and Charles the Bald (d. 877), his youngest son. Lothair took East Francia, comprising both banks of the Rhine and eastwards, leaving Charles West Francia with the empire to the west of the Rhineland and the Alps. Louis the German (d. 876), the middle child, who had been rebellious to the last, was allowed to keep Bavaria under the suzerainty of his elder brother. The division was disputed. Pepin II of Aquitaine (d. after 864), the emperor's grandson, rebelled in a contest for Aquitaine, while Louis the German tried to annex all of East Francia. Louis the Pious died in 840, with the empire still in chaos.A three-year civil war followed his death. By the Treaty of Verdun (843), a kingdom between the Rhine and Rhone rivers was created for Lothair to go with his lands in Italy, and his imperial title was recognised. Louis the German was in control of Bavaria and the eastern lands in modern-day Germany. Charles the Bald received the western Frankish lands, comprising most of modern-day France. Charlemagne's grandsons and great-grandsons divided their kingdoms between their descendants, eventually causing all internal cohesion to be lost. In 987 the Carolingian dynasty was replaced in the western lands, with the crowning of Hugh Capet (r. 987996) as king. In the eastern lands the dynasty had died out earlier, in 911, with the death of Louis the Child, and the selection of the unrelated Conrad I (r.... contains an answer for the question: What is the full name of the person whose imperial title was recognized?, what is it ?
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output: Lothair I

input: Please answer the following: This article: Featuring a soft rock and pop rock sound, Rumours is built around a mix of acoustic and electric instrumentation. Buckingham's guitar work and Christine McVie's use of Fender Rhodes piano or Hammond B-3 organ are present on all but two tracks. The record often includes stressed drum sounds and distinctive percussion such as congas and maracas. It opens with "Second Hand News", originally an acoustic demo titled "Strummer". After hearing Bee Gees' "Jive Talkin'", Buckingham and co-producer Dashut built up the song with four audio tracks of electric guitar and the use of chair percussion to evoke Celtic rock. "Dreams" includes "ethereal spaces" and a recurring two note pattern on the bass guitar. Nicks wrote the song in an afternoon and led the vocals, while the band played around her. The third track on Rumours, "Never Going Back Again", began as "Brushes", a simple acoustic guitar tune played by Buckingham, with snare rolls by Fleetwood using brushes; the band added vocals and further instrumental audio tracks to make it more layered. Inspired by triple step dancing patterns, "Don't Stop" includes both conventional acoustic and tack piano. In the latter instrument, nails are placed on the points where the hammers hit the strings, producing a more percussive sound. "Go Your Own Way" is more guitar-oriented and has a four-to-the-floor dance beat influenced by The Rolling Stones' "Street Fighting Man". The album's pace slows down with "Songbird", conceived solely by Christine McVie using a nine-foot Steinway piano. Side two of Rumours begins with "The Chain", one of the record's most complicated compositions. A Christine McVie demo, "Keep Me There", and a Nicks song were re-cut in the studio and were heavily edited to form parts of the track. The whole of the band crafted the rest using an approach akin to creating a film score; John McVie provided a prominent solo using a fretless bass guitar, which marked a speeding up in tempo and the start of the song's final third. Inspired by R&B, "You Make Loving Fun" has... contains an answer for the question: Who created a song before they were in Fleetwood Mac?, what is it ?
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output:
Nicks