How many {encoded by} are for {L-Arginine} ?
How many encode L-Arginine?
L-Arginine is encoded by how many?
SELECT ( COUNT ( ?x ) AS ?m ) { resource:L-Arginine property:encoded_by ?x }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q173670> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P702> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q173670 wdt:P702 ?obj }
6