(S (S (S (S (NP (BASENP (NNP Eurostar)) (CC and) (BASENP (NNP Channel) (NN tunnel) (NNS services))) (VP (VBD were) (VP (ADVP (RB also)) (VP (VBN disrupted) (PP (IN for) (BASENP (DT an) (JJ extended) (NN period))))))) (COMMA ,) (SBAR (WHADVP (WRB when)) (S (BASENP (NNS trains)) (VP (VP (VP (VBD broke) (PRT (RP down))) (ADVP (RB temporarily))) (S (VP (VBG stranding) (NP (QP (ADVP (IN at) (JJS least)) (NN 2000)) (NNS passengers)))))))) (PP (VBG according) (PP (TO to) (NP (NP (CC both) (BASENP (NNP BBC) (CC and) (NNP Guardian))) (NNS reports))))) (PERIOD .))