[Q]: This article: Johann Sebastian Bach composed the church cantata Erschallet, ihr Lieder, erklinget, ihr Saiten! (Ring out, you songs; sound, you strings!), BWV 172, in Weimar for Pentecost Sunday in 1714. Bach led the first performance on 20 May 1714 in the Schlosskirche, the court chapel in the ducal Schloss. Erschallet, ihr Lieder is an early work in a genre to which he later contributed complete cantata cycles for all occasions of the liturgical year. Bach was appointed Konzertmeister in Weimar in the spring of 1714, a position that called for the performance of a church cantata each month. He composed Erschallet, ihr Lieder as the third cantata in the series, to a text probably written by court poet Salomon Franck. The text reflects different aspects of the Holy Spirit. The librettist included a quotation from the day's prescribed Gospel reading in the only recitative, and for the closing chorale he used a stanza from Philipp Nicolai's hymn "Wie schön leuchtet der Morgenstern" (1599). The work is in six movements, and scored for four vocal soloists, four-part choir, three trumpets, timpani, oboe, bassoon and a string orchestra of two violins, two violas, and basso continuo. The orchestra for the holiday occasion is festive compared to the two works previously composed in Weimar. The cantata opens with a chorus, followed by the recitative, in which words spoken by Jesus are sung by the bass as the vox Christi (voice of Christ). A bass aria with trumpets addresses the Trinity, and a tenor aria then describes the Spirit that was present at the Creation. This is followed by an intimate duet of the Soul (soprano) and the Spirit (alto), to which an oboe plays the ornamented melody of Martin Luther's hymn "Komm, Heiliger Geist, Herre Gott" and a solo cello provides the bass line. The theme of intimacy between God and Man is developed further in the following chorale, after which Bach specified an unusual repeat of the opening chorus. While Bach served as Thomaskantor – director of church music – in Leipzig from 1723, he... contains an answer for the question: Where did Johann Sebastian Bach play  Erschallet, ihr Lieder, erklinget, ihr Saiten! in 1723?, what is it ?
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[A]: Leipzig


input: Please answer the following: This article: The seabed contains enormous reserves of minerals which can be exploited by dredging. This has advantages over land-based mining in that equipment can be built at specialised shipyards and infrastructure costs are lower. Disadvantages include problems caused by waves and tides, the tendency for excavations to silt up and the washing away of spoil heaps. There is a risk of coastal erosion and environmental damage. Seafloor massive sulphide deposits are potential sources of silver, gold, copper, lead and zinc and trace metals since their discovery in the 1960s. They form when geothermally heated water is emitted from deep sea hydrothermal vents known as "black smokers". The ores are of high quality but prohibitively costly to extract. Small scale mining of the deep sea floor is being developed off the coast of Papua New Guinea using robotic techniques, but the obstacles are formidable.There are large deposits of petroleum, as oil and natural gas, in rocks beneath the seabed. Offshore platforms and drilling rigs extract the oil or gas and store it for transport to land. Offshore oil and gas production can be difficult due to the remote, harsh environment. Drilling for oil in the sea has environmental impacts. Animals may be disorientated by seismic waves used to locate deposits, probably causing the beaching of whales. Toxic substances such as mercury, lead and arsenic may be released. The infrastructure may cause damage, and oil may be spilt.Large quantities of methane clathrate exist on the seabed and in ocean sediment at a temperature of around 2 °C (36 °F) and these are of interest as a potential energy source. Some estimates put the amount available at between one and 5 million cubic kilometres (0.24 to 1.2 million cubic miles). Also on the seabed are manganese nodules formed of layers of iron, manganese and other hydroxides around a core. In the Pacific these may cover up to 30 percent of the deep ocean floor. The minerals precipitate from seawater and grow very slowly. Their commercial extraction for... contains an answer for the question: What are of interest as a potential energy source?, what is it ?
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output: Large quantities of methane clathrate


Problem: This article: The location of the Acra is important for understanding how events unfolded in Jerusalem during the struggle between Maccabean and Seleucid forces. This has been the subject of debate among modern scholars. The most detailed ancient description of the nature and location of the Acra is found in Josephus' Antiquities of the Jews, where it is described as residing in the Lower City, upon a hill overlooking the Temple enclosure: ...and when he had overthrown the city walls, he built a citadel [Greek: Acra] in the lower part of the city, for the place was high, and overlooked the temple; on which account he fortified it with high walls and towers, and put into it a garrison of Macedonians. However, in that citadel dwelt the impious and wicked part of the multitude, from whom it proved that the citizens suffered many and sore calamities. The location of the "lower part of the city", elsewhere referred to as the "Lower City", at the time of Josephus (1st century CE) is accepted to be Jerusalem's south-eastern hill, the original urban center traditionally known as the City of David. Lying to the south of the Temple Mount, however, the area exposed today is significantly lower than the Mount itself. The top of the Mount is approximately 30 metres (98 ft) above the ground level at the southern retaining wall of the later Herodian-era expansion of the Temple enclosure. The elevation decreases to the south of this point. Josephus, a native of Jerusalem, would have been well aware of this discrepancy, yet is nevertheless able to explain it away by describing how Simon had razed both the Acra and the hill on which it had stood. Archaeological research south of the Temple Mount, however, has failed to locate any evidence for such large-scale quarrying. On the contrary, excavations in the region have uncovered substantial evidence of habitation from the beginning of the first millennium BCE down to Roman times, casting doubt on the suggestion that during Hellenistic times the area was significantly higher than it was at the... contains an answer for the question: In which area has excavations uncovered substantial evidence of habitation?, what is it ?

A:
south of the Temple Mount