What is Sestao?
{{Infobox settlement | name = Sestao | settlement_type = [[Municipalities of Spain|Municipality]] | official_name = <!-- if different from name --> | native_name = <!-- if different from name --> | image_skyline = Sestao Kasko udaletxea.jpg | image_alt = | image_caption = The town hall in Sestao | image_flag = BANDERA_SESTAO.jpg | image_shield = Escudo de Sestao.svg | nickname = | motto = | pushpin_map = Spain Basque Country#Spain | pushpin_label_position = | pushpin_map_caption = Location of Sestao within the Basque Country | subdivision_type = [[List of sovereign states|Country]] | subdivision_name = {{ESP}} | subdivision_type1 = [[Autonomous communities of Spain|Autonomous community]] | subdivision_name1 = {{flag|Basque Country}} | subdivision_type2 = [[Provinces of Spain|Province]] | subdivision_name2 = [[Biscay]] | subdivision_type3 = [[Comarcas of Spain|Comarca]] | subdivision_name3 = [[Greater Bilbao]] | seat_type = <!-- [[Capital (political)|Capital]] --> | seat = | coordinates = {{coord|43|18|39|N|3|0|20|W|region:ES_type:city|display=inline,title}} | coordinates_footnotes = | elevation_m = 67,62 | elevation_min_m = | elevation_max_m = | area_footnotes = | area_total_km2 = 3.49 | established_title = Segregatted | established_date = 1805 | population_as_of = {{Spain metadata Wikidata|population_as_of}} | population_footnotes = {{Spain metadata Wikidata|population_footnotes}} | population_total = {{Spain metadata Wikidata|population_total}} | population_demonym = sestaotarra<ref>{{cite web |url= http://www.euskaltzaindia.net/index.php?option=com_eoda&Itemid=206&lang=eu&nonkodea=2.4.02.07&view=toponimia|author=Euskaltzaindia|author-link=Euskaltzaindia|title=Euskal Onomastikaren