Complex sentence: Farrell, who is Christian, believes that marriage is between a man and a woman but has said I don't think that I have the right or anybody has a right to tell somebody who they can or can't love.
Split into simpler sentences: Farrell, who is Christian, believes that marriage is between a man and a woman. However, she has also said I don't think that I have the right or anybody has a right to tell somebody who they can or can't love.