(S (S (BASENP (NN One) (JJ additional) (NN procedure)) (VP (VBZ covers) (NP (NP (BASENP (DT the) (NN admission)) (PP (IN of) (BASENP (NNS ambulances)))) (PP (TO to) (BASENP (DT the) (JJ main) (NN base) (NN area)))))) (PERIOD .))