What is {total fertility rate} of {Mauritania} that is {determination method} is {estimation process} ?
How was the total fertility rate of Mauritania determined?
What method was used to determine the total fertility rate of Mauritania?
SELECT ?e WHERE { resource:Mauritania property:total_fertility_rate ?t . ?t property:total_fertility_rate ?e . ?t property:determination_method resource:estimation_process }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1025> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P4841> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P459> <http://wikidata.dbpedia.org/resource/Q791801>
} 

SELECT ?obj WHERE { wd:Q1025 p:P4841 ?s . ?s ps:P4841 ?obj . ?s pq:P459 wd:Q791801 }