(S (S (NP (NP (BASENP (JJ Excessive) (NN wind)) (CC and) (BASENP (JJ unexpected) (NN precipitation))) (PRN (COMMA ,) (NP (CC or) (BASENP (JJ nutrient) (NN level) (NNS jumps))) (COMMA ,))) (VP (MD would) (VP (ADVP (RB also)) (VB contribute)))) (PERIOD .))