A spark plug includes a center electrode, an insulator holding the center electrode inserted thereinto, a housing holding the insulator inserted thereinto and a ground electrode joined to the housing so as to form a spark discharge gap with the center electrode. The invention is responsive to the annotation of a document to passively generate a query that retrieves documents that have similar content to the annotated passage. The formal ticket data includes authentication information for admission, ticket notation information, and authentication information for acquisition of information for a ticket owner. A main body may receive the gas cartridge, the puncturing member and the lever.