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