(S (S (NP (BASENP (DT The) (NN incubation) (NN period)) (PP (IN of) (BASENP (NN foot) (CC and) (NN mouth) (NN disease)))) (VP (VBZ is) (ADJP (JJ such) (SBAR (IN that) (S (SBAR (IN if) (S (BASENP (NNS animals)) (VP (VBP have) (VP (VBN been) (VP (VBN infected)))))) (COMMA ,) (S (BASENP (NNS signs)) (VP (MD should) (VP (VB be) (ADJP (JJ evident) (PP (IN within) (BASENP (NN ten) (NNS days)))))))))))) (PERIOD .))