A communication server 200 acquires a request specifying a desired location for content creation from a requester terminal 310, and provides a notification of the request to an accepter terminal 300 accepting the content creation. Cross-linked polyethylene has a resistance of more than 3500 hours against water treated with chlorine dioxide when tested according to a modified method of ASTM F2263-03. The arithmetic average of the roughness Ra of at least one of the surfaces is 1 to 3. The white sub-pixels are disposed between two adjacent first sub-pixel columns, and the white sub-pixels extend along the first direction, and form a plurality of white sub-pixel columns disposed in parallel. An automatic actuatorretractor can be provided to withdraw the sensors, extend the sensors to or retract the sensors from adjacent the feed path. The closure device contains a housing, a poppet member, and a biasing member.