(S (S (BASENP (DT The) (NNS strikes)) (VP (VBP have) (VP (VBN caused) (S (NP (BASENP (DT a) (JJ significant) (NN number)) (PP (IN of) (BASENP (JJ Kenyan) (NNS hospitals)))) (VP (TO to) (VP (VB cease) (BASENP (NNS operations)))))))) (PERIOD .))