Student A:Context: The 20 World Cup tournaments have been won by eight different national teams. Brazil have won five times, and they are the only team to have played in every tournament. The other World Cup winners are Germany and Italy, with four titles each; Argentina and inaugural winner Uruguay, with two titles each; and England, France and Spain, with one title each.

Question: how many times have spain won world cup?
Student B:OK... To answer this question, we should know that: The other World Cup winners are Germany and Italy, with four titles each; Argentina and inaugural winner Uruguay, with two titles each; and England, France and Spain, with one title each.
one.

Problem:A lower pair is an ideal joint that constrains contact between a surface in the moving body to a corresponding surface in the fixed body. A lower pair is one in which there occurs a surface or area contact between two members, e.g. nut and screw, universal joint used to connect two propeller shafts. Cases of lower joints:

Answer this question: universal joint is an example of which pair?
Solution:OK... The relevant information is: A lower pair is one in which there occurs a surface or area contact between two members, e.g. nut and screw, universal joint used to connect two propeller shafts.
A lower pair.

Student A:Context: Halley's Comet or Comet Halley, officially designated 1P / Halley, is a short-period comet visible from Earth every 74 -- 79 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in a human lifetime. Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061.

Question: when is halley's comet coming around again?
Student B:OK... To answer this question, we should know that: Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061.
mid-2061.

Problem:Thanos' first appearance was in The Invincible Iron Man # 55 (February 1973), featuring a story by Jim Starlin that was co-scripted by Mike Friedrich. The storyline from that issue continued through Captain Marvel # 25 -- 33 (bi-monthly: March 1973 -- Jan. 1974), Marvel Feature # 12 (Nov. 1973), Daredevil # 107 (Jan. 1974), and Avengers # 125 (July 1974). He returned in an extended storyline that spanned Strange Tales # 178 -- 181 (Feb. -- Aug. 1975), Warlock # 9-11 (Oct. 1975 -- Jan. 1976), Marvel Team Up # 55 (March 1977), and the 1977 Annuals for Avengers and Marvel Two-in-One (Thanos does not actually appear until the end of Warlock # 9). He was also featured in a short backup story in Logan's Run # 6 (June 1977) and had a small role in the Death of Captain Marvel graphic novel (April 1982).

When did thanos first appear in the comics?
Solution:OK... To answer this question, we should know that: Thanos' first appearance was in The Invincible Iron Man # 55 (February 1973), featuring a story by Jim Starlin that was co-scripted by Mike Friedrich.
The Invincible Iron Man # 55 ( February 1973 ).

Student A:Passage: Quaternary (/ kwtrnri /) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.588 0.005 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.588 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today). The informal term "Late Quaternary" refers to the past 0.5 -- 1.0 million years.

Question: Based on this passage, when did the quaternary period begin and end?
Student B:OK... The relevant information is: It follows the Neogene Period and spans from 2.588 0.005 million years ago to the present.
2.588 0.005 million years ago to the present.

Student A:The opening stage was won by Fernando Gaviria of Quick-Step Floors, who became the Tour's first rider to wear the general classification leader's yellow jersey. Peter Sagan (Bora -- Hansgrohe) then took the race lead the following stage. BMC Racing Team won stage three's team time trial, putting their rider Greg Van Avermaet in yellow. He held the jersey for eight days until the second high mountain stage, where stage winner Thomas took the lead. He held it for the rest of the race to become the first Welshman to win the overall race. As a result, Team Sky -- and additionally British riders -- won six of the previous seven Tours dating back to 2012.

Answer this question: who won the first stage of the 2018 tour de france?
Student B:
OK... This is the relevant information: The opening stage was won by Fernando Gaviria of Quick-Step Floors, who became the Tour's first rider to wear the general classification leader's yellow jersey.
Fernando Gaviria.