Complex sentence: He captained the Bulgarian national team from 2006 to 2010, and is its all-time leading goalscorer and has also won the Bulgarian Footballer of the Year a record seven times, surpassing the number of wins by Hristo Stoichkov.
Split into simpler sentences: He captained the Bulgarian national team from 2006 to 2010, and is its all-time leading goalscorer. He has also won the Bulgarian Footballer of the Year a record seven times, surpassing the number of wins by Hristo Stoichkov.