(S (S (SBAR (IN After) (S (VP (VBG losing) (BASENP (NN contact))))) (COMMA ,) (S (S (BASENP (DT the) (NN teenager)) (VP (VBD activated) (NP (BASENP (NN two) (JJ manual) (NN distress) (NNS radiobeacons)) (CONJP (COMMA ,) (CC or)) (BASENP (NNPS EPIRBs))))) (CONJP (COMMA ,) (CC and)) (S (BASENP (DT a) (JJ search-and-rescue) (NN operation)) (VP (VBD was) (VP (VBN formed)))))) (PERIOD .))