prefix bio: <http://purl.org/vocab/bio/0.1/> 
prefix foaf: <http://xmlns.com/foaf/0.1/> 
prefix time: <http://www.w3.org/2006/time#> 
prefix xsd:  <http://www.w3.org/2001/XMLSchema#>
prefix ex: <http://example.org/ex#> 
prefix thing: <http://example.org/thing#> 


# Find the latest address that contains a date before 1874
# Find the next address
select ?nameBefore ?nameAfter where {
  thing:anon bio:condition ?condBefore .
  ?condBefore ex:residence ?resBefore .
  ?resBefore foaf:name ?nameBefore .
  ?condBefore time:intervalContains ?dateBefore .
  filter (xsd:integer(?dateBefore) <= 1874) .

  thing:anon bio:condition ?condAfter .
  ?condAfter ex:residence ?resAfter .
  ?resAfter foaf:name ?nameAfter .
  ?condAfter time:intervalContains ?dateAfter .
  filter (xsd:integer(?dateAfter) > 1874) .

  ?condBefore time:intervalBefore ?condAfter .
}