( You ( ( can ( ( ( have ( your ( students ( research sunspots ) ) ) ) and ) ( determine ( ( ( what point ) ( of ( the ( 11-year ( sunspot cycle ) ) ) ) ) ( they ( are viewing ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (MD can) (VP (VP (VB have) (NP (PRP$ your) (JJ students) (NN research) (NNS sunspots))) (CC and) (VP (VB determine) (SBAR (WHNP (WP what) (NN point) (PP (IN of) (NP (DT the) (JJ 11-year) (NN sunspot) (NN cycle)))) (S (NP (PRP they)) (VP (VBP are) (VP (VBG viewing)))))))) (. .)))
You can have your students research sunspots and determine what point of the 11-year sunspot cycle they are viewing.
(ROOT (S (NP (NNS Sunspots)) (VP (VBP occur) (PP (IN in) (NP (DT a) (CD 11) (NN year) (NN cycle)))) (. .)))