Information: - The Dartford-Thurrock River Crossing, commonly known as the Dartford Crossing and until 1991 the Dartford Tunnel, is a major road crossing of the River Thames in England, carrying the A282 road between Dartford in Kent to the south with Thurrock in Essex to the north. It consists of two bored tunnels and the cable-stayed Queen Elizabeth II Bridge. The only fixed road crossing of the Thames east of Greater London, it is the busiest estuarial crossing in the United Kingdom, with an average daily use of over 130,000 vehicles. It opened in stages: the west tunnel in 1963, the east tunnel in 1980 and the bridge in 1991. The crossing, despite not being under motorway restrictions, is considered part of the M25 motorway's route, using the tunnels northbound and bridge southbound. Described as one of the most important road crossings in Britain, it suffers from heavy traffic and congestion. - The Dartford Cable Tunnel is an 11,000,000 tunnel upstream of the Dartford Crossing built in 2003 - 4 . Its diameter is ~ 3m . It is designed to carry and allow for maintenance of 380kV National Grid electrical cable beneath the Thames ; it is accessible by foot as a crossing of the Thames , but by authorised personnel only . - Dartford is the principal town in the Borough of Dartford, Kent, England. The town is situated on the border of Kent and Greater London, bordering the London Borough of Bexley. It also borders the Borough of Thurrock, Essex, via the Dartford Crossing of the River Thames and Gravesham to its east. - The River Thames is a river that flows through southern England. At , it is the longest river entirely in England and the second longest in the United Kingdom, after the River Severn. It also flows through Oxford (where it is called Isis), Reading, Henley-on-Thames and Windsor. The lower reaches of the river are called the Tideway, derived from its long tidal reach up to Teddington Lock. It rises at Thames Head in Gloucestershire, and flows into the North Sea via the Thames Estuary. The Thames drains the whole of Greater London. Given the information above, choose from the list below the object entity that exhibits the relation 'crosses' with the subject 'dartford cable tunnel'. Choices: - river thames - severn
river thames

(Question)
Information: - Chungnam National University ( CNU ) is one of ten Flagship Korean National Universities . - Korean Flagship National Universities (Hanja: , literally: national universities designed as provincial centres) had been created by the South Korean government to lead the development of South Korea into a developed country through providing the highest educational institutions nationwide. The Korean government created one flagship national university for each province between 1946 and 1968 when South Korea consisted of two provinces and eight independent cities. Ten Korean Flagship National Universities have been taking roles as the leading national institutes of higher education in South Korea. - Hanja is the Korean name for Chinese characters. More specifically, it refers to those Chinese characters borrowed from Chinese and incorporated into the Korean language with Korean pronunciation. "Hanja-mal" or "hanja-eo" refers to words that can be written with hanja, and "hanmun" refers to Classical Chinese writing, although "hanja" is sometimes used loosely to encompass these other concepts. Because hanja never underwent major reform, they are almost entirely identical to traditional Chinese and "kyjitai" characters. Only a small number of hanja characters are modified or unique to Korean. By contrast, many of the Chinese characters currently in use in Japan and Mainland China have been simplified, and contain fewer strokes than the corresponding hanja characters. Given the information above, choose from the list below the object entity that exhibits the relation 'country' with the subject 'chungnam national university'. Choices: - china - chinese - japan - south korea
(Answer)
south korea