With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Sarah Paulson was in a show created by Aaron Sorkin.
text_B: The Knudsen pump also referred to as `` thermal transpiration pump '' or `` Knudsen compressor '' is a gas pump that utilizes no moving parts .. pump. pump. moving parts. moving parts. thermal transpiration. thermal transpiration. Instead it uses thermal transpiration , the phenomenon that gas molecules drift from the cold end to the hot end of a narrow channel .. thermal transpiration. thermal transpiration. This thermal transpiration flow is induced when the boundary walls of the pump have a temperature gradient .. pump. pump. thermal transpiration. thermal transpiration. Because the pump is based simply on temperature differences and has no moving parts , it could provide reliable and precise control of gas flow for a variety of applications , such as gas-sensing breath analyzers , chemical weapons detectors , and in satellite control .. pump. pump. moving parts. moving parts. chemical weapons. chemical weapons. satellite. satellite. It is named after Martin Knudsen , a Danish physicist .. Martin Knudsen. Martin Knudsen
not_related.