Complex sentence: While in Santa Ana, she painted the portrait of Senora De La Rosa, a 128-year-old Mexican lady, who is presently being researched by the "Guinness Book of Records" as the oldest person to ever have lived.
Split into simpler sentences: While in Santa Ana, she painted the portrait of Senora De La Rosa, a 128 year old Mexican lady. The Senora is presently being researched by the Guinness Book of Records as the oldest person to ever have lived.