( ( Definition ( of ( magnitude ( , ( luminosity ( , ( brightness ( , ( distance ( , ( temperature ( , size ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (NP (NP (NNP Definition)) (PP (IN of) (NP (NN magnitude) (, ,) (NN luminosity) (, ,) (NNS brightness) (, ,) (NN distance) (, ,) (NN temperature) (, ,) (NN size))) (. .)))
Definition of magnitude, luminosity, brightness, distance, temperature, size.
(ROOT (S (NP (NNP Distance)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN magnitude) (CC or) (NN size)) (PP (IN of) (NP (NP (NN displacement)) (PP (IN between) (NP (CD two) (NNS positions))))))))) (. .)))