How many {this taxon is source of} are to/by {Sichuan pepper} ?
Where does the taxon source of Sichuan pepper come from?
What's the taxon source of Sichuan pepper?
SELECT ( COUNT ( ?q ) AS ?w ) { ?q property:this_taxon_is_source_of resource:Sichuan_pepper }
SELECT (COUNT(?sub) AS ?subs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?sub .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1672> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q756800 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P1672 wd:Q756800 }
4