How many {connecting line} are for {Channel Tunnel} ?
The Channel Tunnel has what number of connecting lines?
How many connecting lines are there for the Channel Tunnel?
SELECT ( COUNT ( ?y ) AS ?n ) { resource:Channel_Tunnel property:connecting_line ?y }
SELECT (COUNT(?obj) AS ?objs ) {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q10257> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P81> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
} 

SELECT (COUNT(?obj) AS ?value ) { wd:Q10257 wdt:P81 ?obj }
5