Student A:Mark first appears in season two, introduced as a highly respected otolaryngologist sub-specialized in plastic surgery and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey). Derek explains that Mark had an affair with his wife, Addison (Kate Walsh) while they were living in New York. Mark travels to Seattle, intent on convincing Addison to return with him, but his offer is rejected and Derek declines to renew their friendship. Mark returns during season three at Addison's drunken behest, but she again rejects him once sober. Undeterred, Mark sells his successful private practice (which he previously shared with Derek) and takes over the plastics program at Seattle Grace Hospital. During Meredith's morphine rampage, Mark finds out about his nickname McSteamy which was given to him by her during his first trip to Seattle back when he attempted to get Addison back and earn Derek's friendship back. It is later revealed that Mark has at some point slept with all of Derek's sisters. Mark has a brief fling with Addison's friend, orthopedic surgeon Callie Torres (Sara Ramirez), and develops a friendship with Derek's girlfriend, intern Meredith Grey (Ellen Pompeo). It is revealed that after Derek left New York, Mark and Addison continued their relationship for two months, during which she conceived and aborted his child. Just weeks after moving to Seattle he quickly observes that Derek's true love was Meredith and tries to convince Addison that her marriage with Derek was over. Mark enters into a sixty-day abstinence pact with Addison, agreeing that if they can remain celibate for that time, Addison will give their relationship another chance. Addison ultimately breaks the pact by having sex with intern Alex Karev (Justin Chambers), and soon thereafter departs from Seattle to work in Los Angeles.

Answer this question: when does mark show up in grey anatomy?
Student B:OK... The relevant information is: Mark first appears in season two, introduced as a highly respected otolaryngologist sub-specialized in plastic surgery and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey).
season two.

Problem:John Cabot (Italian: Giovanni Caboto, Venetian: Zuan Chabotto; c. 1450 -- c. 1500) was a Venetian navigator and explorer whose 1497 discovery of the coast of North America under the commission of Henry VII of England was the first European exploration of the mainland of North America since the Norse visits to Vinland in the eleventh century. To mark the celebration of the 500th anniversary of Cabot's expedition, both the Canadian and British governments elected Cape Bonavista, Newfoundland, as Cabot's first landing site. However, alternative locations have also been proposed.

Answer this question: who was the first english explorer to reach north america in 1497?
Solution:OK... This is the relevant information: John Cabot (Italian: Giovanni Caboto, Venetian: Zuan Chabotto; c. 1450 -- c. 1500) was a Venetian navigator and explorer whose 1497 discovery of the coast of North America under the commission of Henry VII of England was the first European exploration of the mainland of North America since the Norse visits to Vinland in the eleventh century.
John Cabot.

Student A:"Lullaby" is a song by American rock singer Shawn Mullins, from the album Soul's Core. It was released in 1998. The song has been Mullins' most successful song to date, reaching number-one on the Adult Top 40, number 7 on the Billboard Hot 100, and number 9 on the Modern Rock Tracks in the United States. It also had success abroad, reaching number 9 on the UK Singles Chart, number 5 in Australia and number 2 in Canada.

Who sings everything's going to be alright rockabye?
Student B:OK... To answer this question, we should know that: "Lullaby" is a song by American rock singer Shawn Mullins, from the album Soul's Core.
Shawn Mullins.

Problem:The College Football Playoff selection committee chose the semifinalists following the conclusion of the 2017 regular season. Alabama and Georgia advanced to the national championship after winning the semifinal games hosted by the Sugar Bowl and the Rose Bowl, respectively, on January 1, 2018. The championship game was played at Mercedes-Benz Stadium in Atlanta, Georgia on January 8, 2018.

Answer this question based on the passage: where will college football national championship game be played?
Solution:OK... To answer the above question, the relevant sentence is: The championship game was played at Mercedes-Benz Stadium in Atlanta, Georgia on January 8, 2018.
Mercedes - Benz Stadium in Atlanta , Georgia.

Student A:For medical purposes, X-ray filters are used to selectively attenuate, or block out, low-energy rays during x-ray imaging (radiography). Low energy x-rays (less than 30 keV) contribute little to the resultant image as they are heavily absorbed by the patient's soft tissues (particularly the skin). Additionally, this absorption adds to the risk of stochastic (e.g. cancer) or non stochastic radiation effects (e.g. tissue reactions) in the patient. Thus, it is favorable to remove these low energy X-rays from the incident light beam. X-ray filtration may be inherent due to the X-ray tube and housing material itself or added from additional sheets of filter material. The minimum filtration used is usually 2.5 mm aluminium (Al) equivalent, although there is an increasing trend to use greater filtration. Manufacturers of modern fluoroscopy equipment utilize a system of adding a variable thickness of copper (Cu) filtration according to patient thickness. This typically ranges from 0.1 to 0.9 mm Cu.

Based on this passage, the function of an x ray beam filter in diagnostic radiology is to?
Student B:OK... To answer the question, consider the following: For medical purposes, X-ray filters are used to selectively attenuate, or block out, low-energy rays during x-ray imaging (radiography).
selectively attenuate , or block out , low - energy rays during x-ray imaging ( radiography ).

Student A:This goose breeds north of the timberline in Greenland, Canada, Alaska, and the northeastern tip of Siberia, and spends winters in warm parts of North America from southwestern British Columbia through parts of the United States to Mexico. They fly as far south as Texas and Mexico during winter, and return to nest on the Arctic tundra each spring. It is a rare vagrant to Europe, but a frequent escape from collections and an occasional feral breeder. Snow geese are visitors to the British Isles where they are seen regularly among flocks of barnacle, Brent and Greenland white-fronted geese. There is also a feral population in Scotland from which many vagrant birds in Britain seem to derive.

Where do snow geese go for the winter?
Student B:
OK... To answer this question, we should know that: This goose breeds north of the timberline in Greenland, Canada, Alaska, and the northeastern tip of Siberia, and spends winters in warm parts of North America from southwestern British Columbia through parts of the United States to Mexico.
warm parts of North America from southwestern British Columbia through parts of the United States to Mexico.