After Kerry's 1972 defeat, he and his wife bought a house in Belvidere, Lowell, entering a decade which his brother Cameron later called "the years in exile". He spent some time working as a fundraiser for the Cooperative for Assistance and Relief Everywhere (CARE), an international humanitarian organization. In September 1973, he entered Boston College Law School. While studying, Kerry worked as a talk radio host on WBZ and, in July 1974, was named executive director of Mass Action, a Massachusetts advocacy association.

Answer this question, if possible (if impossible, reply "unanswerable"): Where was Kerry a talk radio host?
WBZ