PREFIX ex: <http://example.com/ns#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX sh: <http://www.w3.org/ns/shacl#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>

delete {
        ex:validPerson1 ex:knows  "steve".
} insert {
        ex:validPerson1 a ex:Person ;
	        ex:knows ex:peter.

        ex:peter a ex:Person, ex:Human.

} where {
        ?a ?b ?c
}