SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Digit-Alb> <http://dbpedia.org/ontology/regionServed> ?uri. <http://dbpedia.org/resource/Christine_Rolfes> <http://dbpedia.org/ontology/birthPlace> ?uri}
Which of the continents that Digitalb worked in, was christine rolfes born in?
SELECT DISTINCT ?d WHERE { resource:Digit-_Alb property:region_served ?d . resource:Christine_Rolfes property:birth_place ?d }
North America
The region that DigitAlb served and place of birth of Christine Rolfes is [North America].
The region where Alb served and where Cristina Rolland was born is [North America].