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Relation: subrelation

direct-childrendocumentationgraph
mutualAcquaintance5(mutualAcquaintance ?H1 ?H2) means that ?H1 and ?H2 have met each other and know something about ...^
    friend.(holdsDuring ?T1 (friend ?H1 ?H2)) means that during time ?T1, ?H1 and ?H2 know each other, sha...^

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