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At the time of the conversion described in footnote (1), each outstanding stock option to purchase shares of the Issuer's Class B Common Stock automatically converted into a stock option to purchase the same number of shares of the Issuer's Class A Common Stock.  Otherwise, the terms of each such stock option remained unchanged."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents stock options that were granted on August 30, 2019.  At the time of the conversion described in footnote (1), each outstanding stock option to purchase shares of the Issuer's Class B Common Stock automatically converted into a stock option to purchase the same number of shares of the Issuer's Class A Common Stock.  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At the time of the conversion described in footnote (1), each outstanding stock option to purchase shares of the Issuer's Class B Common Stock automatically converted into a stock option to purchase the same number of shares of the Issuer's Class A Common Stock.  Otherwise, the terms of each such stock option remained unchanged."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents stock options that were granted on August 30, 2019.  At the time of the conversion described in footnote (1), each outstanding stock option to purchase shares of the Issuer's Class B Common Stock automatically converted into a stock option to purchase the same number of shares of the Issuer's Class A Common Stock.  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At the time of the conversion described in footnote (1), each outstanding stock option to purchase shares of the Issuer's Class B Common Stock automatically converted into a stock option to purchase the same number of shares of the Issuer's Class A Common Stock.  Otherwise, the terms of each such stock option remained unchanged."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents stock options that were granted on March 6, 2019.  At the time of the conversion described in footnote (1), each outstanding stock option to purchase shares of the Issuer's Class B Common Stock automatically converted into a stock option to purchase the same number of shares of the Issuer's Class A Common Stock.  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