Complex sentence: It was during that job that a photo of her kissing then-mayor Mel Lastman ended up on the front cover of the "Toronto Sun", marking the start of her career in the public eye.
Split into simpler sentences: It was during that job that a photo of her kissing then-mayor Mel Lastman which ended up on the front cover of the "Toronto Sun". The photo was the start of her career in the public eye.