( ( The ( Nucleus ( The nucleus ) ) ) ( ( ( ( is ( ( the ( largest organelle ) ) ( in ( a ( eukaryotic cell ) ) ) ) ) and ) ( ( is often ) ( considered ( to ( be ( ( the ( cell 's ) ) ( control center ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Nucleus) (NNP The) (NN nucleus)) (VP (VP (VBZ is) (NP (NP (DT the) (JJS largest) (NN organelle)) (PP (IN in) (NP (DT a) (JJ eukaryotic) (NN cell))))) (CC and) (VP (VBZ is) (ADVP (RB often)) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (NP (NP (DT the) (NN cell) (POS 's)) (NN control) (NN center)))))))) (. .)))
The Nucleus   The nucleus is the largest organelle in a eukaryotic cell and is often considered to be the cell's control  center.
(ROOT (S (PP (IN Along) (PP (IN with) (NP (JJ other) (NNS organelles)))) (, ,) (NP (DT all) (JJ eukaryotic) (NNS cells)) (VP (VBP possess) (NP (NN nucleus))) (. .)))