what is the {point in time} for {Mauritius} has {inflation rate} as {2.8} ?
Do you know the year when Mauritius had an inflation rate of 2.8?
when exactly did Mauritius have an inflation rate of 2.8?
SELECT ?g WHERE { ?p property:inflation_rate ?q . ?p property:point_in_time ?g . resource:Mauritius property:inflation_rate ?p . FILTER ( CONTAINS ( ?q , '2.8' ) ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1027> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1279> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <2.8> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q1027 p:P1279 ?s . ?s ps:P1279 ?x filter(contains(?x , '2.8')) . ?s pq:P585 ?value}