Complex sentence: On February 11,2006, Nemeth suffered a massive heart attack, but recovered and was well enough to attend the July 2006 NFB convention and accept the 2006 Louis Braille award which the organization gave him.
Split into simpler sentences: On February 11,2006, Nemeth suffered a massive heart attack and is currently recovering. He was well enough to attend the July 2006 NFB convention and accept the 2006 Louis Braille award which the organization gave him.