( ( The sun ) ( ( goes ( through ( ( 11-year cycles ) ( in ( sunspot activity ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ goes) (PP (IN through) (NP (NP (JJ 11-year) (NNS cycles)) (PP (IN in) (NP (JJ sunspot) (NN activity)))))) (. .)))
The sun goes through 11-year cycles in sunspot activity.
(ROOT (S (NP (NNS Sunspots)) (VP (VBP occur) (PP (IN in) (NP (DT a) (CD 11) (NN year) (NN cycle)))) (. .)))