How many {mother} are to/by {Cloris Leachman} ?
How many children did Cloris Leachman have?
Cloris Leachman was a mother to how many?
SELECT ( COUNT ( ?r ) AS ?f ) { ?r property:mother resource:Cloris_Leachman }
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/P25> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q230131 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P25 wd:Q230131 }
5