( ( ( Both ( the ( ( numbers and ) locations ) ) ) ( of sunspots ) ) ( ( vary ( in ( an ( 11-year ( sunspot cycle ) ) ) ) ) . ) )
(ROOT (S (NP (NP (PDT Both) (DT the) (NNS numbers) (CC and) (NNS locations)) (PP (IN of) (NP (NNS sunspots)))) (VP (VBP vary) (PP (IN in) (NP (DT an) (JJ 11-year) (NN sunspot) (NN cycle)))) (. .)))
Both the numbers and locations of sunspots vary in 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)))) (. .)))