from (source)
Ausgangspunkt — wo etwas herkommt
Starting point — where something comes from
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Ich komme gerade von der Arbeit.— I've just come from work.
Colloquially "von + Dativ" often stands in for Genitiv: "das Auto von meinem Bruder" instead of "das Auto meines Bruders". Formal writing prefers Genitiv. With proper names the von-construction is standard: "das Werk von Goethe".