Your students will learn how the confluence of the White Nile and Blue Nile created one of Earth's most fertile 
(Your students; will learn; how the confluence of the White Nile and Blue Nile created one of Earth's most fertile) Context(Your students will learn,List([0, 24))):(the confluence of the White Nile and Blue Nile; created; one of Earth's most fertile)
Your students will learn,List([0, 24))
Your students the confluence of the White Nile and Blue Nile
will learn created
how the confluence of the White Nile and Blue Nile created one of Earth's most fertile
one of Earth's most fertile