With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Charlie Chaplin had a headache.
text_B: Gary Parsons is the former chairman of the board for Sirius XM Radio .. Sirius XM Radio. Sirius XM Radio. Parsons was also formerly on the board of WorldSpace .. WorldSpace. WorldSpace. Parsons was with MCI Communications Corporation , where he served in a variety of roles from 1990 to 1996 .. MCI Communications. MCI Communications. He served as chairman of the board of directors for XM Satellite Radio from May 1997 .. XM Satellite Radio. XM Satellite Radio. He served as CEO until the recruitment of Hugh Panero .. Hugh Panero. Hugh Panero. Parsons was chairman of the board of directors of Motient Corporation from March 1998 to May 2002 .. Parsons joined Motient in July 1996 , and also served as its chief executive officer and president .. He serves on the board of Sorrento Networks Corporation and is chairman and was previously chief executive officer of Mobile Satellite Ventures L.P. Parsons resigned from his position as chairman of the board for Sirius XM Radio in November 2009 , and was succeeded by independent director Eddy Hartenstein .. Sirius XM Radio. Sirius XM Radio. He has two sons , Gary `` Mike '' Michael Parsons Jr. and Kenneth James Parsons .. He is currently the Executive Chairman of the Board at NextNav .. NextNav. NextNav
not_related.