Complex sentence: Martin Pistorius (born 1976) is a South African freelance web designer, developer, and author best known for his 2011 book "Ghost Boy", in which he describes living with locked-in syndrome and being unable to move for 12 to 14 years.
Split into simpler sentences: Martin Pistorius (born 1976) is a South African freelance web designer, developer, and author. Pistorius is known for his book "Ghost Boy", where he describes living with locked-in syndrome and being unable to move for 12 to 14 years.