(S (S (NP (QP (RB About) (BASENP (DT a) (NN dozen))) (NNS civilians)) (VP (MD can) (VP (VB be) (VP (VBN seen) (S (VP (VP (VBG surrounding) (NP (BASENP (DT the) (NN lead) (NN car)) (PP (IN of) (BASENP (DT the) (NN convoy))))) (S (VP (VBG talking) (PP (TO to) (BASENP (NNP UN) (NNS observers))))))))))) (PERIOD .))