Student A:Ariel is a spirit who appears in William Shakespeare's play The Tempest. Ariel is bound to serve the magician Prospero, who rescued him from the tree in which he was imprisoned by Sycorax, the witch who previously inhabited the island. Prospero greets disobedience with a reminder that he saved Ariel from Sycorax's spell, and with promises to grant Ariel his freedom. Ariel is Prospero's eyes and ears throughout the play, using his magical abilities to cause the tempest in Act One which gives the play its name, and to foil other characters' plots to bring down his master.

Answer this question: where was ariel before prospero set him free?
Student B:OK... The important part for answering this question is: Ariel is bound to serve the magician Prospero, who rescued him from the tree in which he was imprisoned by Sycorax, the witch who previously inhabited the island.
the tree in which he was imprisoned by Sycorax.

Student A:A deadweight loss, also known as excess burden or allocative inefficiency, is a loss of economic efficiency that can occur when equilibrium for a good or a service is not achieved. That can be caused by monopoly pricing in the case of artificial scarcity, an externality, a tax or subsidy, or a binding price ceiling or price floor such as a minimum wage.

Answer this question: deadweight loss measures the inefficiency as the loss of?
Student B:OK... This is the relevant information: A deadweight loss, also known as excess burden or allocative inefficiency, is a loss of economic efficiency that can occur when equilibrium for a good or a service is not achieved.
economic efficiency.

Student A:Oh originally auditioned for the role of Miranda Bailey, although Chandra Wilson was ultimately cast in the part. Oh has received generally positive reviews for her portrayal, with Mark Perigard of the Boston Herald considering her friendship with Meredith to be "the secret core of Grey's". Oh has also garnered numerous awards and nominations for her role as Yang, including Golden Globe and Screen Actors Guild Award wins in 2006. She was additionally nominated for the Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series each year, from 2005 to 2009. Characterizing the character, ABC noted her competitiveness, ambition, and intelligence as her main traits, while her aggressive, and tactless attitude was highlighted as her main weakness. In May 2012, E! Online reported that Oh had signed on for two more years, along with her fellow cast members. Oh left the show after season 10, and her character Cristina Yang was written out of the storyline as a main cast member.

Answer this question: what season did christina yang leave grey anatomy?
Student B:OK... The important part for answering this question is: Oh left the show after season 10, and her character Cristina Yang was written out of the storyline as a main cast member.
after season 10.

Student A:Context: The coat of arms of Nigeria has a black shield with two white lines that form in a "Y" shape. The black shield represents Nigeria's fertile soil, while the two horses or chargers on each side represent dignity. The eagle represents strength, while the green and white bands on the top of the shield represent the rich soil.

Question: black shield in nigeria coat of arm represent what?
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 to answer the above question is: The black shield represents Nigeria's fertile soil, while the two horses or chargers on each side represent dignity.
Nigeria 's fertile soil.