A method for gathering and recording temporal information for a linked entity, the method including identifying a link related activity within a linked source entity, and recording a time stamp in association with the link related activity. Molding material-injecting passages and a plurality of sprue holes 102 are provided for injecting the molding materials S into the slots 101. The spreadsheet includes a user-friendly interface that prompts the user to enter predetermined network parameters but does not display the embedded equations.