{
    "@context": {
        "ex": "http://example.org/",
        "xsd": "http://www.w3.org/2001/XMLSchema#",
        "ex:name": {
            "@type": "xsd:string"
        },
        "ex:birthdate": {
            "@type": "xsd:date"
        },
        "ex:knows": {
            "@type": "@id"
        },
        "ex:enrolledIn": {
            "@type": "@id"
        }
    },
    "@graph": [
        {
            "@id": "http://example.org/a",
            "ex:name": "Alice",
            "ex:birthdate": "1990-05-02",
            "ex:enrolledIn": "http://example.org/cs101"
        },
        {
            "@id": "http://example.org/b",
            "ex:name": "Robert",
            "ex:knows": "http://example.org/a",
            "ex:enrolledIn": "http://example.org/cs101"
        },
        {
            "@id": "http://example.org/cs101",
            "ex:name": "Computer Science"
        }
    ]
}
