Acknowledgements

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This work has been supported by many entities, including the National Science Foundation (NSF) the Defense Advanced Research Projects Administration (DARPA), the Army Research Laboratory (ARL), the National Geospatial-Intelligence Agency (NGA), and the Intelligence Advanced Research Projects Activity (IARPA). See my cv and list of funding sources for a complete list. Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the sponsoring organization.

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