How many {connects with} are for {Okinawa Island} ?
Okinawa Island connects with how many ?
SELECT (COUNT(?obj) AS ?value ) { wd:Q600614 wdt:P2789 ?obj }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q600614> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2789> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

With how many does Okinawa Island connect with?