provenance/sharp_sale/1 matches the site

public static Activity Purchase_Of_Stolen_Painting()
{
    var purchase = new Activity()
        .WithContext()
        .WithId("https://linked.art/example/provenance/sharp_sale/1")
        .WithLabel("Purchase of Stolen Painting")
        .WithClassifiedAs(Aat.ProvenanceActivity);

    var alter = new Person()
        .WithId("https://linked.art/example/person/alter")
        .WithLabel("Jerry Alter");

    purchase.Part = [
        new TransferOfCustody
        {
            Label = "Sale of Painting",
            TransferredCustodyOf = [
                new HumanMadeObject()
                    .WithId("https://linked.art/example/object/cheyenne")
                    .WithLabel("Cheyenne Oklahoma")
            ],
            TransferredCustodyFrom = [alter]
        }.WithClassifiedAs(Aat.Term("300438484", "sale of stolen goods")),
        new Payment
        {
            PaidAmount = new MonetaryAmount
            {
                Label = "Payment to Thief",
                Value = 52650,
                Currency = Aat.UsDollars.WithNotation("USD")
            },
            PaidTo = [alter]
        }
    ];

    return purchase;
}

• Terms outside the registry The vocabulary registry holds only the terms linked.art itself publishes, so a dataset's own concepts, places and people are written with Aat.Term, Tgn.Place and Ulan.Person, giving the id and the label.

var activity = new Activity
{
    Context = ["https://linked.art/ns/v1/linked-art.json"],
    Id = "https://linked.art/example/provenance/sharp_sale/1",
    Label = "Purchase of Stolen Painting",
    ClassifiedAs = [Aat.ProvenanceActivity],
    Part =
    [
        new TransferOfCustody
        {
            Label = "Sale of Painting",
            ClassifiedAs = [Aat.Term("300438484", "sale of stolen goods")],
            TransferredCustodyOf =
            [
                new HumanMadeObject
                {
                    Id = "https://linked.art/example/object/cheyenne",
                    Label = "Cheyenne Oklahoma",
                },
            ],
            TransferredCustodyFrom =
            [
                new Person
                {
                    Id = "https://linked.art/example/person/alter",
                    Label = "Jerry Alter",
                },
            ],
        },
        new Payment
        {
            PaidAmount = new MonetaryAmount
            {
                Label = "Payment to Thief",
                Value = 52650,
                Currency = new Currency("http://vocab.getty.edu/aat/300411994", "US Dollars")
                {
                    Notation = "USD",
                },
            },
            PaidTo =
            [
                new Person
                {
                    Id = "https://linked.art/example/person/alter",
                    Label = "Jerry Alter",
                },
            ],
        },
    ],
};

Generated from the object the example builds: every property that is set, as object initialisers, with the vocabulary constants where a term is in the registry. The fluent helpers are a convenience, not a requirement; this form and the one as written produce the same JSON.