Student A:Mahindra Tractors is an international farm equipment manufacturer of Mahindra & Mahindra. In 2010, Mahindra became the world's highest-selling tractor brand by volume. Mahindra's largest consumer base is in India, China, North America, and a growing market in Australia. The company is the largest manufacturer in India and has the capacity to build 150,000 tractors a year.

Based on this passage, who is the largest tractor manufacturer in the world?
Student B:OK... To answer the question, consider the following: In 2010, Mahindra became the world's highest-selling tractor brand by volume.
Mahindra Tractors.

Student A:Escherichia coli (/ ˌɛʃɪˈrɪkiə ˈkoʊlaɪ /; also known as E. coli) is a Gram-negative, facultative aerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms). Most E. coli strains are harmless, but some serotypes can cause serious food poisoning in their hosts, and are occasionally responsible for product recalls due to food contamination. The harmless strains are part of the normal microbiota of the gut, and can benefit their hosts by producing vitamin K, and preventing colonization of the intestine with pathogenic bacteria, having a symbiotic relationship. E. coli is expelled into the environment within fecal matter. The bacterium grows massively in fresh fecal matter under aerobic conditions for 3 days, but its numbers decline slowly afterwards.

Answer this question based on the passage: what is the full name of e coli?
Student B:OK... The important part for answering this question is: Escherichia coli (/ ˌɛʃɪˈrɪkiə ˈkoʊlaɪ /; also known as E. coli) is a Gram-negative, facultative aerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms).
Escherichia coli.

Student A:The 2017 NFL season is the 98th and current season in the history of the National Football League (NFL). The season began on September 7, 2017, with the Kansas City Chiefs defeating the defending Super Bowl LI champion New England Patriots 42 -- 27 in the NFL Kickoff Game. The season will conclude with Super Bowl LII, the league's championship game, on February 4, 2018, at U.S. Bank Stadium in Minneapolis, Minnesota.

When does the regular football season start for nfl?
Student B:OK... To answer the question, consider the following: The season began on September 7, 2017, with the Kansas City Chiefs defeating the defending Super Bowl LI champion New England Patriots 42 -- 27 in the NFL Kickoff Game.
September 7 , 2017.

Student A:In September 2015, Amazon announced the release of the Fire 7, priced at US $49.99 for the 8GB version that displays advertisements on the lock screen. As of March 2016 it was the lowest-priced Amazon tablet. In June 2016, its price was dropped briefly to US $39.99. This fifth generation tablet includes for the first time a micro SD card slot for extra storage.

Answer this question: when did the amazon fire 7 come out?
Student B:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
OK... The relevant information is: In September 2015, Amazon announced the release of the Fire 7, priced at US $49.99 for the 8GB version that displays advertisements on the lock screen.
September 2015.