Question:  How many scientist have won an award by the society led by Venkatraman Ramakrishnan?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:leaderName <http://dbpedia.org/resource/Venkatraman_Ramakrishnan> . ?uri prop:prizes ?x  . ?uri rdf:type onto:Scientist}