PREFIX pub: <http://ontology.ontotext.com/taxonomy/>
PREFIX publishing: <http://ontology.ontotext.com/publishing#>

select ?personLabel ?party_label ?document ?mention where {
    ?mention publishing:hasInstance ?person .
    ?document publishing:containsMention ?mention .
    ?person pub:memberOfPoliticalParty ?party .
    ?person pub:preferredLabel ?personLabel .
    ?party pub:hasValue ?value .
    ?value pub:preferredLabel ?party_label .

    filter((?personLabel = "Barack Obama"@en || ?personLabel = "Judy Chu"@en) && ?personLabel = "Michelle Obama"@en )
} order by ?mention