(S (S (NP (NP (BASENP (DT The) (JJ first) (JJ British) (NN serviceman)) (SBAR (S (VP (TO to) (VP (VB give) (BASENP (NN evidence))))))) (PRN (COMMA ,) (NP (BASENP (DT a) (JJ senior) (NN aircraftsman)) (PP (IN in) (BASENP (DT the) (NNP RAF)))) (COMMA ,))) (VP (VBD testified) (SBAR (IN that) (S (BASENP (PRP he)) (VP (VBD saw) (S (NP (BASENP (NNS prisoners)) (PP (IN with) (NP (BASENP (NNS bags)) (PP (IN over) (BASENP (PRPD their) (NNS heads)))))) (VP (VBG being) (VP (VP (VBN kicked)) (CC and) (VP (ADVP (RB verbally)) (VBN abused)))))))))) (PERIOD .))