Surabaya metropolitan area
The Surabaya metropolitan area , known locally as Gerbangkertosusila ( an acronym of Gresik–Bangkalan–Mojokerto–Surabaya–Sidoarjo–Lamongan ) , is a metropolitan area in East Java , Indonesia . 
<triplet> Surabaya metropolitan area <subj> Indonesia <obj> country <triplet> East Java <subj> Indonesia <obj> country <triplet> Indonesia <subj> East Java <obj> contains administrative territorial entity