(S (S (NP (BASENP (NNS Relatives)) (PP (IN of) (BASENP (DT the) (NNS boys)))) (VP (VP (VP (VBD were) (PP (IN at) (NP (BASENP (DT the) (NNS gates)) (PP (IN of) (BASENP (DT the) (JJ Canadian) (JJ military) (NN base)))))) (BASENP (JJ last) (NN night))) (S (VP (VBG demanding) (BASENP (NNS answers)))))) (PERIOD .))