Student A:NASA's Mars Exploration Rover (MER) mission is an ongoing robotic space mission involving two Mars rovers, Spirit and Opportunity, exploring the planet Mars. It began in 2003 with the launch of the two rovers: MER-A Spirit and MER-B Opportunity -- to explore the Martian surface and geology; both landed on Mars at separate locations in January 2004. Both rovers far outlived their planned missions of 90 Martian solar days: MER-A Spirit was active until 2010, while MER-B Opportunity is still active in 2018, and holds the record for the longest distance driven by any off-Earth wheeled vehicle.

Based on this passage, what are the names of the two rovers currently exploring mars?
Student B:OK... The relevant information to answer the above question is: NASA's Mars Exploration Rover (MER) mission is an ongoing robotic space mission involving two Mars rovers, Spirit and Opportunity, exploring the planet Mars.
Spirit.

Student A:Karen Gillan (born 28 November 1987) is a Scottish actress, director, screenwriter and model. She played the role of Amy Pond, companion to the Eleventh Doctor, in the BBC One science fiction series Doctor Who (2010 -- 2013). She has received wide recognition for portraying Nebula in the Marvel Cinematic Universe films Guardians of the Galaxy (2014), Guardians of the Galaxy Vol. 2 (2017), Avengers: Infinity War (2018), and its untitled sequel (2019), and also played Ruby Roundhouse in the box-office hit Jumanji: Welcome to the Jungle (2017).

Answer this question: who does karen gillian play in the avengers?
Student B:OK... The relevant information is: She has received wide recognition for portraying Nebula in the Marvel Cinematic Universe films Guardians of the Galaxy (2014), Guardians of the Galaxy Vol. 2 (2017), Avengers: Infinity War (2018), and its untitled sequel (2019), and also played Ruby Roundhouse in the box-office hit Jumanji: Welcome to the Jungle (2017).
Nebula.

Student A:Passage: Historically, rubies have also been mined in Thailand, in the Pailin and Samlout District of Cambodia, as well as in Afghanistan, Australia, Brazil, Colombia, India, Namibia, Japan, and Scotland; after the Second World War ruby deposits were found in Madagascar, Nepal, Pakistan, Tajikistan, Tanzania, and Vietnam. In Sri Lanka, lighter shades of rubies (often "pink sapphires") are more commonly found. Republic of Macedonia is the only country in mainland Europe to have naturally occurring rubies. They can mainly be found around the city of Prilep. Macedonian ruby has a unique raspberry color. The ruby is also included on the Macedonian Coat of Arms. A few rubies have been found in the U.S. states of Montana, North Carolina, South Carolina and Wyoming.

Question: Based on this passage, where can rubies be found in the us?
Student B:OK... The important part for answering this question is: A few rubies have been found in the U.S. states of Montana, North Carolina, South Carolina and Wyoming.
the U.S. states of Montana , North Carolina , South Carolina and Wyoming.

Student A:Context: The official ceremony to mark the "turning of the first sod" occurred on 28 July 1923, on the spot at Milsons Point on the north shore where two workshops to assist in building the bridge were to be constructed.

Question: when did construction start on the sydney harbour bridge?
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... To answer the question, consider the following: The official ceremony to mark the "turning of the first sod" occurred on 28 July 1923, on the spot at Milsons Point on the north shore where two workshops to assist in building the bridge were to be constructed.
28 July 1923.