Complex sentence: For instance, the early books are dominated by scouting-related themes and community service, while the 1990s-era books subtly point out the social, economic and cultural changes that occurred in Poland at that time.
Split into simpler sentences: For instance, the early books are dominated by scouting-related themes and community service. While the 1990s-era books subtly point out the social, economic and cultural changes that occurred during in Poland at that time.