In Erosion , students investigate how wind, glaciers, and especially water cause erosion of 
(students; investigate; how wind, glaciers, and especially water cause erosion of; L:In Erosion) Context(students investigate,List([13, 33))):(wind, glaciers, and especially water; cause; erosion of)
students investigate,List([13, 33))
students wind, glaciers, and especially water
investigate cause
how wind, glaciers, and especially water cause erosion of L:In Erosion
erosion of