( ( ( The size ) ( of sunspots ) ) ( also ( ( seems ( to ( follow ( ( the ( 11-year cycle ) ) ( of ( ( the number ) ( of sunspots ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (NN size)) (PP (IN of) (NP (NNS sunspots)))) (ADVP (RB also)) (VP (VBZ seems) (S (VP (TO to) (VP (VB follow) (NP (NP (DT the) (JJ 11-year) (NN cycle)) (PP (IN of) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NNS sunspots)))))))))) (. .)))
The size of sunspots also seems to follow the 11-year cycle of the number of sunspots.
(ROOT (S (NP (NNS Sunspots)) (VP (VBP occur) (PP (IN in) (NP (DT a) (CD 11) (NN year) (NN cycle)))) (. .)))