(S (S (BASENP (NNS Conditions)) (VP (VBP are) (VP (VP (VBN described) (PP (IN as) (S (VP (VBG being) (ADJP (RB very) (JJ difficult)))))) (COMMA ,) (PP (IN with) (NP (BASENP (JJ high) (NNS temperatures)) (CC and) (NP (BASENP (NNS lots)) (PP (IN of) (BASENP (NN dust))))))))) (PERIOD .))