Complex sentence: On July 10,2007, Jacobson announced that she will leave WCVB-TV on July 18,2007, after holding a tenure there of just over 35 years.
Split into simpler sentences: On July 10,2007, Jacobson announced that she would leave WCVB-TV. Her last telecast as anchor aired on July 18,2007, ending a tenure there of just over 35 years.