Complex sentence: Mulroney is best known as the host of the entertainment news program, "etalk" where he covers major events in entertainment, including the Oscars, the Golden Globes, and the Juno Awards.
Split into simpler sentences: Mulroney is best known as the host of the entertainment news program, "etalk". On "etalk" he has covered major events in entertainment, including the Oscars, the Golden Globes, and the Juno Awards.