Complex sentence: On February 11,2015, Simon was killed in a car crash; the livery cab he was a passenger in crashed and exploded after hitting a gas tanker truck on New York City's West Side Highway.
Split into simpler sentences: On February 11,2015, Simon was killed in a car crash. The livery cab he was a passenger in crashed and exploded after hitting a gas tanker truck on New York City's West Side Highway.