They used their math skills to measure the shadows and determine the difference in their lengths throughout the day.
(They; used; their math skills; to measure the shadows and determine the difference in their lengths throughout the day) Context(They used,List([0, 9))):(They; used their math skills to measure; the shadows) Context(They used,List([0, 9))):(They; used their math skills to determine; the difference in their lengths throughout the day)
They used,List([0, 9)) They used,List([0, 9))
They They They
used used their math skills to measure used their math skills to determine
their math skills to measure the shadows and determine the difference in their lengths throughout the day
the shadows
the difference in their lengths throughout the day