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?"

Response: "1911"

A: yes

Dirk Diggler was born as Steven Samuel Adams on April 15 , 1961 outside of Saint Paul , Minnesota . His parents were a construction worker and a boutique shop owner who attended church every Sunday and believed in God . Looking for a career as a male model , Diggler dropped out of school at age 16 and left home . He was discovered at a falafel stand by Jack Horner . Diggler met his friend , Reed Rothchild , through Horner in 1979 while working on a film . Horner slowly introduced Diggler to the business until he became noticeable within the industry . Diggler became a prominent model and began appearing in pornographic films , after Which his career took off . He had critical and box office hits Which led him to stardom . The hits and publicity led to fame and money Which led Diggler to the world of drugs . With the amount of money Diggler was making he was able to support both his and Rothchild's addictions . The drugs eventually caused a breakup between Diggler and Horner since Diggler was having issues with his performance on set . After the breakup Diggler tried to make a film himself but the film was never completed . He then attempted a music career Which was also successful but led him deeper into drugs because of the amount of money he was making . He then starred in a TV show Which was a failure both critically and commercially . Having failed and with no work , Diggler returned to the porn industry taking roles in low-budget homosexual films to help support his habit .

Question: "What caused Diggler to have less success?"

Response: "Drugs"

A: yes

Dubai's Crown Prince Sheikh Mohamed Bin Rashid Al Maktoum inaugurated a free zone for e-commerce today, called Dubai Internet City. The preliminary stages of the project, the only one of its kind according to its designers, are estimated at $200 million. Sheikh Mohamed, who is also the Defense Minister of the United Arab Emirates, announced at the inauguration ceremony that "we want to make Dubai a new trading center." The minister, who has his own website, also said: "I want Dubai to be the best place in the world for state-of-the-art technology companies." He said companies engaged in e-commerce would be able to set up offices, employ staff and own equipment in the open zone, including fully-owned foreign companies. The e-commerce free zone is situated in north Dubai, near the industrial free zone in Jebel Ali, the top regional and tenth international leading area in container transit. The inauguration of Dubai Internet City coincides with the opening of an annual IT show in Dubai, the Gulf Information Technology Exhibition (Gitex), the biggest in the Middle East.

Question: "Where did the minister talk about the Dubai internet city?"

Response: "Jebel Ali"

A:
no