Complex sentence: The Maharaja Harisinghji Trophy (Gr.3) at Mahalaxmi Racecourse in Mumbai, Sprint Star and Misschievous Trot; the first time in the history of Indian Horse racing that a dead heat occurred in a graded race.
Split into simpler sentences: The Maharaja Harisinghji Trophy (Gr.3) at Mahalaxmi Racecourse in Mumbai witnessed a dead heat between two horses when SPRINT STAR and MISSCHIEVOUS TROT dead heated for win. It was the first time in the history of Indian Horse racing that a dead heat had been witnessed in a graded race.