what is the name of an artist which focuses on mosaics as a medium for their art?
Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity Entity
g.121h834r g.1238gkjd g.12dpx21c3 m.026n0_d m.02v_xvw m.02w3m4 m.03y495t m.05mrvd0 m.0gyw76j m.0nb0jzq m.0zrq8gw m.02pvn0f m.07kg8p_ m.04cps2 m.04cqr6m m.0ch3tys m.0264gsb
null null null Einar Hákonarson Júlíana Sveinsdóttir Edo Murtić Trento Longaretti Pamela Irving Steffen Thomas Sosus of Pergamon Grace Clements Mirka Mora Hans Unger Gino Severini Emile Norman Thomas Miller Seymour Fogel
class entity
visual_art.visual_artist m.0gmk4
visual_art.visual_artist visual_art.visual_art_form
Visual Artist mosaics
none none
visual_art.visual_artist.art_forms
Art Forms
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 :visual_art.visual_artist . 
VALUES ?x1 { :m.0gmk4 } 
?x0 :visual_art.visual_artist.art_forms ?x1 . 
FILTER ( ?x0 != ?x1  )
}
}
(AND visual_art.visual_artist (JOIN visual_art.visual_artist.art_forms m.0gmk4))