sale.type is a string

{"facet" => true, "index" => true, "infix" => false, "locale" => "", "name" => "sale.type", "optional" => true, "sort" => false, "stem" => false, "stem_dictionary" => "", "store" => true, "type" => "string"}

if i want to filter all sales that have in

sale.type

equal to

EnglishAuction

what should i put in the filter than