input: Copyright 20142015 All Rights Reserved
fixed: Copyright ©️ 2014-2015 All Rights Reserved.

input: I learned more from his rambling lectures than from those of anyone else at Princeton I remember the first lecture of his I ever attended
fixed: ... I learned more from his rambling lectures than from those of anyone else at Princeton. I remember the first lecture of his I ever attended.

input: Your blood oxygen level is a measurement how much oxygen is reaching your muscles
fixed: Your blood oxygen level is a measurement how much oxygen is reaching your muscles.

input: With superior image quality and widescreen cinematic picture National Geographic Channel HD takes National Geographic Channels shows to a new level
fixed:
With superior image quality and widescreen cinematic picture, National Geographic Channel HD takes National Geographic Channel's shows to a new level.