Complex sentence: Breaks greater than 147 are possible when an opponent fouls and leaves a with all fifteen reds still remaining on the table, but has been achieved only once in professional competition, when Jamie Burnett made a 148 at the qualifying stage of the 2004 UK Championship.
Split into simpler sentences: Breaks greater than 147 are possible when an opponent fouls and leaves a with all fifteen reds still remaining on the table. Only one break greater than 147 has been scored in professional competition, when Jamie Burnett made a 148 at the qualifying stage of the 2004 UK Championship.