( ( Sunspots cycles ) ( ( average ( close ( to ( 11 years ) ) ) ) . ) )
(ROOT (S (NP (JJ Sunspots) (NNS cycles)) (VP (VBP average) (ADJP (JJ close) (PP (TO to) (NP (CD 11) (NNS years))))) (. .)))
Sunspots cycles average close to 11 years.
(ROOT (S (NP (NNS Sunspots)) (VP (VBP occur) (PP (IN in) (NP (DT a) (CD 11) (NN year) (NN cycle)))) (. .)))