( ( ( ( ( Debris ( from ( the explosion ) ) ) , ) ( caused ( by ( a ( colliding asteroid ) ) ) ) ) , ) ( ( was ( ( ( spread ( around ( the globe ) ) ) , ) ( ( plunging ( the Earth ) ) ( into ( a ( long ( , ( dark winter ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Debris)) (PP (IN from) (NP (DT the) (NN explosion))) (, ,) (VP (VBN caused) (PP (IN by) (NP (DT a) (VBG colliding) (NN asteroid)))) (, ,)) (VP (VBD was) (VP (VBN spread) (PP (IN around) (NP (DT the) (NN globe))) (, ,) (S (VP (VBG plunging) (NP (DT the) (NN Earth)) (PP (IN into) (NP (DT a) (JJ long) (, ,) (JJ dark) (NN winter))))))) (. .)))
Debris from the explosion, caused by a colliding asteroid, was spread around the globe, plunging the Earth into a long, dark winter.
(ROOT (S (PP (IN In) (NP (DT the) (NN past))) (, ,) (NP (NP (NNS asteroids)) (VP (VBG colliding) (PP (IN with) (NP (NN planet) (NN earth))))) (VP (VBZ has) (VP (VBN caused) (NP (JJ many) (NNS organisms)) (S (VP (TO to) (VP (VB die) (PRT (RP off))))))) (. .)))