(S (S (BASENP (PRP They)) (VP (VBD had) (VP (VBN been) (VP (VP (VBN traveling) (PP (IN along) (NP (BASENP (DT the) (NNP Shamalan) (NNP Canal)) (PRN (COMMA ,) (PP (IN near) (NP (BASENP (NNP Lashkar) (NNP Gah)) (PP (IN in) (BASENP (NNP Helmand) (NNP Province))))) (COMMA ,))))) (PP (IN on) (S (BASENP (PRPD their) (NN way)) (VP (TO to) (VP (VB resupply) (NP (BASENP (DT an) (NN offensive)) (ADJP (JJ underway) (PP (ADVP (RB currently)) (PP (IN against) (BASENP (DT the) (NNP Taliban)))))))))))))) (PERIOD .))