which geographical features fall under the fissure vent category?
Entity
m.03d6vy_
Crack in the Ground
class entity
geography.geographical_feature m.0f6rw2
geography.geographical_feature geography.geographical_feature_category
Geographical Feature Fissure vent
none none
geography.geographical_feature.category
Category
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 :geography.geographical_feature . 
VALUES ?x1 { :m.0f6rw2 } 
?x0 :geography.geographical_feature.category ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND geography.geographical_feature (JOIN geography.geographical_feature.category m.0f6rw2))