How many {operator} are to/by {Texas A&M University} ?
Which is the number of operators that are there in Texas A&M University?
How many operators are by Texas A&M University?
SELECT ( COUNT ( ?o ) AS ?x ) { ?o property:operator resource:Texas_A&M_University }
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/P137> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q49212 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P137 wd:Q49212 }
6