SAN FRANCISCO (Reuters) - The elderly parents of parody musician "Weird Al" Yankovic have died of apparent carbon monoxide poisoning at their home outside San Diego, the county medical examiner's office said. Nick Yankovic, 86, and his 81-year-old wife, Mary, were discovered on Friday by family members at their Fallbrook, California, residence. It was unclear how long they had been dead. A fire was still burning in the fireplace and authorities said that the home had filled with toxic fumes because the chimney flue was closed. Their son, Al Yankovic, known as "Weird Al," could not immediately be reached for...