How many {location of landing} are to/by {Atlantic Ocean} ?
In the Atlantic Ocean, how many landing locations are there?
How many landing locations are there in the Atlantic Ocean?
SELECT ( COUNT ( ?w ) AS ?t ) { ?w property:location_of_landing resource:Atlantic_Ocean }
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/P1158> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> http://wikidata.dbpedia.org/resource/Q97 .
} 

SELECT (COUNT(?sub) AS ?value ) { ?sub wdt:P1158 wd:Q97 }
25