The present invention is directed to an improved integrated process for the removal of heavy hydrocarbons, carbon dioxide, hydrogen sulfide, and water from a raw natural gas feed stream. Under the invention, the sequence of entity types is identified using probabilistic models that describe the likelihood of a sequence of entities and the likelihood of sequences of characters given particular entities. The first network element receives a discovery response from the second network element with the first target address and the link-layer address of the second network element. A semiconductor device includes an oxide semiconductor layer in a channel formation region, and by the use of an oxide insulating film below and in contact with the oxide semiconductor layer and a gate insulating film over and in contact with the oxide semiconductor layer, oxygen of the oxide insulating film or the gate insulating film is supplied to the oxide semiconductor layer. A content sequences is then streamed to the viewer, and looks to himher just like a TV channel: when one program ends, another starts automatically.