Which river flows through the city of Amsterdam?

Which river is the longest in South Africa? What is the longest river flowing entirely within Turkey? What is the longest river in South America, excluding the Amazon? Which river flows through the city of Prague? Which mountain range runs along the border between France and Spain? What is the longest mountain range in South America? Which mountain range is home to the highest peak in North America? Which mountain range runs through the middle of New Zealand's South Island?