Premise: Marion Mitchell (born 1941 in Seaham, County Durham), better known by her stage name, Janie Jones, was an English singer. She became renowned for holding sex parties at her home during the 1970s, and was jailed for her involvement in 'controlling prostitutes'. She first achieved notoriety in August 1964, when she attended the film premiere of "London in the Raw", wearing a topless dress.
Hypothesis: Marion Mitchell served at least a year in jail.