def construct_inzending_sent_query(graph_uri, inzending_uri, verzonden):
    """
    Construct a SPARQL query for marking a bericht as received by the other party (and thus 'sent' by us)

    :param graph_uri: string
    :param bericht_uri: URI of the bericht we would like to mark as sent.
    :param verzonden: ISO-string representation of the datetetime when the message was sent
    :returns: string containing SPARQL query
    """
    q = """
        PREFIX meb: <http://rdf.myexperiment.org/ontologies/base/>
        PREFIX nmo: <http://www.semanticdesktop.org/ontologies/2007/03/22/nmo#>
        PREFIX prov: <http://www.w3.org/ns/prov#>

        INSERT DATA {{
            GRAPH <{0}> {{
                <{1}> nmo:receivedDate "{2}"^^xsd:dateTime .
            }}
        }}
        """.format(graph_uri, inzending_uri, verzonden)
    return q