( Thunderstorms ( ( ( can also ) ( cause ( disasters ( such ( as ( floods ( , ( fires ( , ( and tornadoes ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Thunderstorms)) (VP (MD can) (ADVP (RB also)) (VP (VB cause) (NP (NP (NNS disasters)) (PP (JJ such) (IN as) (NP (NNS floods) (, ,) (NNS fires) (, ,) (CC and) (NNS tornadoes)))))) (. .)))
Thunderstorms can also cause disasters such as floods, fires, and tornadoes.
(ROOT (S (NP (DT A) (NN stream) (NN flooding)) (VP (VBZ is) (ADVP (RBS most) (RB likely)) (VP (VBN caused) (PP (IN by) (NP (DT a) (NN thunderstorm))))) (. .)))