Give some stream of consciousness and then the answer. In October 2004, The Residences celebrated its ground-breaking, making it the first high-rise condo-hotel project overlooking the strip to begin construction. Other ventures of this type have begun since in Las Vegas, with many of them failing to obtain necessary financing and / or support. On May 12, 2006, the first tower opened for occupancy. The successful opening of The Signature at MGM Grand appears to be aided by its connection to the resources and amenities of The MGM Grand Hotel & Casino.\n\nWhen was the signature at mgm grand built?
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The relevant information to answer the above question is: In October 2004, The Residences celebrated its ground-breaking, making it the first high-rise condo-hotel project overlooking the strip to begin construction.
Therefore, the answer is October 2004.
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