( ( Comet Comets ) ( ( are ( ( chunks ( of ( ( ice and ) rock ) ) ) ( that ( may ( be ( ( the result ) ( of ( ( a collision ) ( between ( ( ( ( ( ( ( ( two moons ) , ) ( planetary bodies ) ) , ) or ) ( a ( small planet ) ) ) and ) ( a moon ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Comet) (NNP Comets)) (VP (VBP are) (NP (NP (NNS chunks)) (PP (IN of) (NP (NN ice) (CC and) (NN rock))) (SBAR (WHNP (WDT that)) (S (VP (MD may) (VP (VB be) (NP (NP (DT the) (NN result)) (PP (IN of) (NP (NP (DT a) (NN collision)) (PP (IN between) (NP (NP (CD two) (NNS moons)) (, ,) (NP (JJ planetary) (NNS bodies)) (, ,) (CC or) (NP (DT a) (JJ small) (NN planet)) (CC and) (NP (DT a) (NN moon))))))))))))) (. .)))
Comet Comets are chunks of ice and rock that may be the result of a collision between two moons, planetary bodies, or a small planet and a moon.
(ROOT (S (NP (NP (DT The) (NNS setmoons)) (, ,) (NP (NNS planets)) (, ,) (CC and) (NP (NNS comets))) (VP (VBZ contains) (NP (NP (JJ only) (NNS objects)) (SBAR (WHNP (WDT that)) (S (VP (VBP shine) (PP (IN as) (NP (NP (DT a) (NN result)) (PP (IN of) (NP (JJ reflected) (NN light)))))))))) (. .)))
The setmoons, planets, and comets contains only objects that shine as a result of reflected light.