With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Julianne Hough is an American singer.
text_B: See Carbonaceous film -LRB- paleontology -RRB- for the paleontology usage .. Carbon films are thin film coatings which consist predominantly of the chemical element carbon .. thin film. thin film. carbon. carbon. They include plasma polymer films , amorphous carbon films -LRB- diamond-like carbon , DLC -RRB- , CVD diamond films as well as graphite films .. carbon. carbon. plasma polymer films. Plasma polymerization. amorphous carbon. amorphous carbon. diamond-like carbon. diamond-like carbon. CVD diamond. CVD diamond. graphite. graphite. Carbon films are produced by deposition using gas-phase deposition processes in most cases taking place in a vacuum  : chemical vapor deposition , CVD or physical vapor deposition , PVD .. vacuum. vacuum. chemical vapor deposition. chemical vapor deposition. physical vapor deposition. physical vapor deposition. They are deposited in the form of thin films with film thicknesses of just a few micrometres .. thin films. thin film. micrometres. micrometre. Carbon films make it possible to implement a large number of surface functions , especially in the field of tribology - in other words , in applications where wear is a major factor .. surface. surface physics. tribology. tribology. wear. wear
not_related.