General relativity includes a dynamical spacetime, so it is difficult to see how to identify the conserved energy and momentum. Noether's theorem allows these quantities to be determined from a Lagrangian with translation invariance, but general covariance makes translation invariance into something of a gauge symmetry. The energy and momentum derived within general relativity by Noether's presecriptions do not make a real tensor for this reason. Einstein argued that this is true for fundamental reasons, because the gravitational field could be made to vanish by a choice of coordinates. He maintained that the non-covariant energy momentum pseudotensor was in fact the best description of the energy momentum distribution in a gravitational field. This approach has been echoed by Lev Landau and Evgeny Lifshitz, and others, and has become standard. The use of non-covariant objects like pseudotensors was heavily criticized in 1917 by Erwin Schrodinger and others.

Question: "When did the standard approach to energy momentum become criticized?"

OPTIONS:
- no
- yes

Answer: "1971"

Response: no

Above were just a few things that caused habitat loss or change. There are many ways in which living organisms can affect their ecosystem. In some areas, it is because of fire management. Fire is a natural event, so managing fire correctly is very important. In other areas, fisherman have taken too many fish from one area. This places the species at risk of extinction. It also affects other living things that may rely on these fish for food. The image below shows a picture of a mine. Mining changes the Earths surface. This area may once have been a forest or a prairie. Think about how many plants and animals may once have lived here. Now it is a giant hole in the ground. Pollution is also a major factor in habitat loss and change.

Question: "Is it possible for a living organism to affect their ecosystem?"

Response: "There are many ways living organisms can affect their ecosystem. One way is by managing fire. Another method can be done by mining"
OPTIONS:
- no
- yes

A: yes

Problem: The series starts in Baghdad at an undetermined time . The Sultan Shahryar has gone mad after accidentally killing his wife during a failed coup d' tat , Which she had planned with Shahryar's brother Schahzenan . In his madness , Shahryar believes that all women now want to kill him , but the law states that the Sultan must be married again or the throne will be passed to his brother . Shahryar therefore orders Grand Vizier Ja'Far ( ( ( Jim Carter to bring him a harem girl to marry and then have executed the next day . In order to prevent this , the Grand Vizier's clever daughter , Scheherazade , decides to marry the Sultan herself . Scheherazade has a plan to prevent her execution and at the same time cure the Sultan of his madness . With the help of some tutoring from a bazaar storyteller , Scheherazade tells the Sultan a story every night , stopping at dawn with a cliffhanger and refusing to continue until dusk . Shahryar must therefore let Scheherazade live for another day in order to hear the rest of the story . Cunningly , Scheherazade has hidden a moral within every story , to bring the Sultan out of his madness . Meanwhile , Schahzenan hears about the Sultan's madness and that he is unable to execute Scheherazade . Perceiving this as weakness , Schahzenan leads his army to Baghdad in an attempt to take the throne by force . However , by the time Schahzenan's army reaches the city , Scheherazade's plan has worked . As a result of her stories , Shahryar has overcome his madness and has fallen in love with Scheherazade .

Question: "What makes Shahryar believe that all women wanted to kill him?"

Answer: "An attempt on his life"

OPTIONS:
- no
- yes
Answer: no

When American 11 struck the World Trade Center at 8:46, no one in the White House or traveling with the President knew that it had been hijacked. While that information circulated within the FAA, we found no evidence that the hijacking was reported to any other agency in Washington before 8:46. Most federal agencies learned about the crash in New York from CNN. Within the FAA, the administrator, Jane Garvey, and her acting deputy, Monte Belger, had not been told of a confirmed hijacking before they learned from television that a plane had crashed. Others in the agency were aware of it, as we explained earlier in this chapter. Inside the National Military Command Center, the deputy director of operations and his assistant began notifying senior Pentagon officials of the incident. At about 9:00, the senior NMCC operations officer reached out to the FAA operations center for information. Although the NMCC was advised of the hijacking of American 11, the scrambling of jets was not discussed. In Sarasota, Florida, the presidential motorcade was arriving at the Emma E. Booker Elementary School, where President Bush was to read to a class and talk about education. White House Chief of Staff Andrew Card told us he was standing with the President outside the classroom when Senior Advisor to the President Karl Rove first informed them that a small, twin-engine plane had crashed into the World Trade Center. The President's reaction was that the incident must have been caused by pilot error. At 8:55, before entering the classroom, the President spoke to National Security Advisor Condoleezza Rice, who was at the White House. She recalled first telling the President it was a twin-engine aircraft-and then a commercial aircraft-that had struck the World Trade Center, adding "that's all we know right now, Mr. President." At the White House, Vice President Dick Cheney had just sat down for a meeting when his assistant told him to turn on his television because a plane had struck the NorthTower of the World Trade Center. The Vice President was wondering "How the hell could a plane hit the World Trade Center" when he saw the second aircraft strike the South Tower. Elsewhere in the White House, a series of 9:00 meetings was about to begin. In the absence of information that the crash was anything other than an accident, the White House staff monitored the news as they went ahead with their regular schedules.

Question: "What was the Vice president doing when he saw a second plane strike the South Tower and what did the rest of the White House staff do?"

OPTIONS:
- no
- yes

Answer: "The Vice President drove to the Pentagon while other staff members alerted the military"

Response:
no