SPARQL Examples

All persons with all properties

PREFIX rlwd: <https://riga-literata.wikibase.cloud/entity/>
PREFIX rlwdt: <https://riga-literata.wikibase.cloud/prop/direct/>

SELECT ?person ?personLabel ?genderLabel ?birthdate ?birthplaceLabel ?deathdate ?deathplaceLabel ?qid ?viaf ?lnc10
WHERE 
{
  ?person rlwdt:P1 rlwd:Q6.
          OPTIONAL { ?person rlwdt:P15 ?gender.}
          OPTIONAL { ?person rlwdt:P18 ?birthdate.}
          OPTIONAL { ?person rlwdt:P20 ?birthplace.}
          OPTIONAL { ?person rlwdt:P19 ?deathdate.}
          OPTIONAL { ?person rlwdt:P21 ?deathplace.}
          OPTIONAL { ?person rlwdt:P6 ?qid.}
          OPTIONAL { ?person rlwdt:P30 ?viaf.}
          OPTIONAL { ?person rlwdt:P4 ?lnc10.}
  
SERVICE wikibase:label { bd:serviceParam wikibase:language "en,[AUTO_LANGUAGE]". }
}

Try it!