what ships fall under the sturgeon-class submarine designation?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
m.03tfcd m.03vyp1 m.03tx1q m.03txdj m.03w128 m.03td_z m.03vfts m.03ty9c m.03szl2 m.03vfsd m.029mqz m.02mg20 m.03vftf m.03w11y m.0249q3 m.03w12z m.03vyqs m.03vyrg m.03vg3x m.026hql m.03w139 m.03ty3d m.03w11l m.01qcth m.03vyrt m.03vyr3 m.024hkq m.03w13_ m.03ts52 m.03tshk
USS Sturgeon (SSN-637) USS Ray (SSN-653) USS Sea Devil (SSN-664) USS Aspro (SSN-648) USS Hammerhead (SSN-663) USS Tautog (SSN-639) USS Puffer (SSN-652) USS Gurnard (SSN-662) USS Whale (SSN-638) USS Bluefish (SSN-675) USS Hawkbill (SSN-666) USS Grayling (SSN-646) USS Spadefish (SSN-668) USS Lapon (SSN-661) USS Tunny (SSN-682) USS Flying Fish (SSN-673) USS Pargo (SSN-650) USS Seahorse (SSN-669) USS Sunfish (SSN-649) USS Archerfish (SSN-678) USS Billfish (SSN-676) USS Trepang (SSN-674) USS Cavalla (SSN-684) USS Sand Lance (SSN-660) USS Silversides (SSN-679) USS Queenfish (SSN-651) USS Richard B. Russell USS Drum (SSN-677) USS L. Mendel Rivers USS Bergall (SSN-667)
class entity
boats.ship m.0767d
boats.ship boats.ship_class
Ship Sturgeon-class submarine
none none
boats.ship.ship_class
Ship Class
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX : <http://rdf.freebase.com/ns/> 
SELECT (?x0 AS ?value) WHERE {
SELECT DISTINCT ?x0  WHERE { 
?x0 :type.object.type :boats.ship . 
VALUES ?x1 { :m.0767d } 
?x0 :boats.ship.ship_class ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND boats.ship (JOIN boats.ship.ship_class m.0767d))