Complex sentence: When asked, Lloyd cannot remember anything afterwards and the doctor doesn't know what caused the injury on his right arm; it is only known that his blood isn't clotting from the wound and he cannot feel anything on his right side.
Split into simpler sentences: When asked, Lloyd cannot remember anything afterwards, and the doctor doesn't know what caused the injury on his right arm. It is only known that his blood isn't clotting from the wound and he cannot feel anything on his right side.