How many {convicted of} are for {Chopper Read} ?
How many persons are convicted in the Chopper Read} ?
SELECT (COUNT(?obj) AS ?value ) { wd:Q2428420 wdt:P1399 ?obj }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2428420> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1399> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

Which is the number of people that are convicted in the Chopper Read?