| http://www.w3.org/ns/prov#value | - While NASA was studying options for a mission either the 2018 or 2020 launch windows, based on the options developed by the Mars Program Planning Group earlier this year after NASA terminated its cooperation with ESA on ExoMars, the timing in particular was unexpected since a decision was thought to be deferred to the release of the fiscal year 2014 budget proposal in February.
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