. . . . . . "2003-09-19T16:04:39+02:00"^^ . . . . . . . . "A Theme moves on or against the surface of a Static_object. (Alternatively, Themes moves against each other simultaneously). The Theme exerts pressure on the surface and experiences resistance to its movement. Smithers' boots scraped on the floor."@en . . . . . . . . . . "820"^^ . . . "Friction" .