Complex sentence: In September, Van Avermaet won the 1.HC-ranked Grand Prix de Wallonie; he was part of a four-strong breakaway and, with the peloton on their heels, Van Avermaet attacked in the final uphill bends to claim his second win of the season.
Split into simpler sentences: In September, Van Avermaet won the 1.HC-ranked Grand Prix de Wallonie. He was part of a four-strong breakaway and, with the peloton on their heels, Van Avermaet attacked in the final uphill bends to claim his second win of the season.