Complex sentence: Protagonist Asterix learns of Getafix's capture from a cart-seller; infiltrates the Roman camp in the latter's cart; and hears Crismus Bonus revealing his intended rebellion to Marcus Ginandtonicus, his second-in-command.
Split into simpler sentences: Protagonist Asterix learns of Getafix's capture from a cart-seller. He infiltrates the Roman camp in a merchant's cart and hears Crismus Bonus revealing his intended rebellion to Marcus Ginandtonicus, his second-in-command.