Subgraph extraction

subgraph() pulls all triples for a given subject into a new, independent TripleLite:

sub = g.subgraph(f"{OC}br/062501777134")
if sub is not None:
    for s, p, o in sub:
        print(p, o.value)

Returns None if the subject has no triples. Modifying the returned graph does not affect the original.