what is the {start time} for {Kingdom of France} has {flag image} as {Flag of France (1790–1794).svg} ?
Which flag was used by the Kingdom of Frank from 1790-1794?
What did the Kingdom of France use for their flag from 1790-1794?
SELECT ?w WHERE { ?k property:start_time ?w . FILTER ( CONTAINS ( ?q , 'Flag of France ( 1790–1794 ) . svg' ) ) . resource:Kingdom_of_France property:flag_image ?k . ?k property:flag_image ?q }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q70972> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P41> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <Flag of France (1790–1794).svg> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q70972 p:P41 ?s . ?s ps:P41 ?x filter(contains(?x , 'Flag of France (1790–1794).svg')) . ?s pq:P580 ?value}