Complex sentence: Gertrude Weaver (born July 4,1898) is an African American supercentenarian who is at the age of the oldest person in the United States and second verified oldest living person in the world behind Japanese woman Misao Okawa.
Split into simpler sentences: Gertrude Weaver (born July 4,1898) is an African American supercentenarian. At the age of, Weaver is the oldest person in the United States and second verified oldest living person in the world behind Japanese woman Misao Okawa.