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We find the most general metric ansatz compatible with the results of Galloway and Graf \cite{GG} constraining asymptotically space-times (and a differentiability assumption), and then study its curvature subject to a variety of geometrical and physical restrictions. In particular we find explicit examples which are asymptotically metrics, in the sense of \cite{GG}, and which satisfy the Null Energy Condition but which differ from .

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