(S (S (S (NP (BASENP (NN One) (NN man)) (PP (IN with) (BASENP (DT a) (NN pistol)))) (VP (VP (VBD forced) (BASENP (NNS employees))) (PP (TO to) (BASENP (DT the) (NN ground))))) (SBAR (IN while) (S (BASENP (DT the) (JJ other) (NN two) (NNS men)) (VP (VBD stole) (BASENP (DT the) (NNS paintings)))))) (PERIOD .))