( Astronomers ( ( ( ( ( classify Deneb ) ( as ( a ( blue supergiant ) ) ) ) , ) ( ( ( a class ) ( of star ) ) ( that ( is ( ( ( hundreds ( of times ) ) larger ) ( than ( the sun ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Astronomers)) (VP (VB classify) (NP (NNP Deneb)) (PP (IN as) (NP (DT a) (JJ blue) (NN supergiant))) (, ,) (NP (NP (DT a) (NN class)) (PP (IN of) (NP (NN star))) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (ADJP (NP (QP (NNS hundreds) (IN of) (NNS times))) (JJR larger)) (PP (IN than) (NP (DT the) (NN sun))))))))) (. .)))
Astronomers classify Deneb as a blue supergiant, a class of star that is hundreds of times larger than the sun.
(ROOT (S (NP (DT The) (NN sun)) (VP (VBZ is) (VP (VBN classified) (PP (IN as) (NP (DT a) (NN star))))) (. .)))
The sun is classified as a star.